List of primary Interstate Highways: Difference between revisions

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imported>Imzadi1979
Undid revision 1322407151 by ~2025-33740-46 (talk); not far enough along in any of those proposals to be listed here
 
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#redirect [[List of Interstate Highways]]
{{Short description|None}}
{{Use American English|date=July 2025}}
{{Use mdy dates|date=August 2013}}
{{infobox state highway system
| title = Dwight D. Eisenhower National System of Interstate and Defense Highways
| shields = {{infobox road/shieldmain/USA|type=I|route=90}}[[File:MUTCD M1-10.svg|70px|alt= Eisenhower Interstate System sign]]
| caption = [[Highway shield]] for Interstate 90 and the Eisenhower Interstate System
| map = {{Maplink|frame=yes|plain=yes|frame-align=center|frame-width=330|frame-height=240|zoom=3|frame-lat=38|frame-long=-96|type=line|from=Interstate 2.map|type2=line|from2=Interstate 4.map|type3=line|from3=Interstate 5.map|type4=line|from4=Interstate 8.map|type5=line|from5=Interstate 10.map|type6=line|from6=Interstate 11.map|type7=line|from7=Interstate 12.map|type8=line|from8=Interstate 14.map|type9=line|from9=Interstate 15.map|type10=line|from10=Interstate 16.map|type11=line|from11=Interstate 17.map|type12=line|from12=Interstate 19.map|type13=line|from13=Interstate 20.map|type14=line|from14=Interstate 22.map|type15=line|from15=Interstate 24.map|type73=line|from73=Interstate 25.map|type16=line|from16=Interstate 26.map|type17=line|from17=Interstate 27.map|type18=line|from18=Interstate 29.map|type19=line|from19=Interstate 30.map|type20=line|from20=Interstate 35.map|type21=line|from21=Interstate 37.map|type22=line|from22=Interstate 39.map|type23=line|from23=Interstate 40.map|type24=line|from24=Interstate 41.map|type25=line|from25=Interstate 42 1.map|type26=line|from26=Interstate 43.map|type27=line|from27=Interstate 44.map|type28=line|from28=Interstate 45.map|type29=line|from29=Interstate 49 1.map|type30=line|from30=Interstate 55.map|type31=line|from31=Interstate 57.map|type32=line|from32=Interstate 59.map|type33=line|from33=Interstate 64.map|type34=line|from34=Interstate 65.map|type35=line|from35=Interstate 66.map|type36=line|from36=Interstate 68.map|type37=line|from37=Interstate 69.map|type38=line|from38=Interstate 70.map|type39=line|from39=Interstate 71.map|type40=line|from40=Interstate 72.map|type41=line|from41=Interstate 73.map|type42=line|from42=Interstate 74.map|type43=line|from43=Interstate 75.map|type44=line|from44=Interstate 76 (Ohio–New Jersey).map|type45=line|from45=Interstate 76 (Colorado–Nebraska).map|type46=line|from46=Interstate 77.map|type47=line|from47=Interstate 78.map|type48=line|from48=Interstate 79.map|type49=line|from49=Interstate 80.map|type50=line|from50=Interstate 81.map|type51=line|from51=Interstate 82.map|type52=line|from52=Interstate 83.map|type53=line|from53=Interstate 84 (Oregon–Utah).map|type54=line|from54=Interstate 84 (Pennsylvania–Massachusetts).map|type55=line|from55=Interstate 85.map|type56=line|from56=Interstate 86 (Idaho).map|type57=line|from57=Interstate 86 (Pennsylvania–New York).map|type58=line|from58=Interstate 87 (North Carolina) 1.map|type59=line|from59=Interstate 87 (New York).map|type60=line|from60=Interstate 88 (Illinois).map|type61=line|from61=Interstate 88 (New York).map|type62=line|from62=Interstate 89.map|type63=line|from63=Interstate 90.map|type64=line|from64=Interstate 91.map|type65=line|from65=Interstate 93.map|type66=line|from66=Interstate 94.map|type67=line|from67=Interstate 95.map|type68=line|from68=Interstate 96.map|type69=line|from69=Interstate 97.map|type70=line|from70=Interstate 99.map|type71=line|from71=Interstate 35W (Texas).map|type72=line|from72=Interstate 35W (Minnesota).map}}
| map_custom = yes
| map_notes = Primary Interstate Highways in the 48 contiguous states as of 2024
| formed = June 29, 1956<ref name=FAHA56>{{cite journal |last= Weingroff |first= Richard F. |title=Federal-Aid Highway Act of 1956, Creating the Interstate System |url= https://highways.dot.gov/public-roads/summer-1996/federal-aid-highway-act-1956-creating-interstate-system |archive-url= https://web.archive.org/web/20210923024744/https://highways.dot.gov/public-roads/summer-1996/federal-aid-highway-act-1956-creating-interstate-system |url-status= dead |archive-date= September 23, 2021 |journal= Public Roads |location= Washington, DC |publisher= [[Federal Highway Administration]] |volume=60 |issue= 1 |date=Summer 1996 |access-date= March 16, 2012}}</ref>
| length_mi =
| length_ref =
| interstate = Interstate X (I-X)
|links = BL
}}
 
There are 71 primary Interstate Highways in the [[Interstate Highway System]], a network of [[freeway]]s in the United States. These primary highways are assigned one- or two-digit [[route number]]s, whereas their associated [[List of auxiliary Interstate Highways|auxiliary Interstate Highways]] receive three-digit route numbers. Typically, even-numbered Interstates run east–west, with lower numbers in the south and higher numbers in the north; odd-numbered Interstates run north–south, with lower numbers in the west and higher numbers in the east. Route numbers divisible by 5 usually represent major coast-to-coast or border-to-border routes (ex. [[Interstate 10|I-10]] connects [[Santa Monica, California]] to [[Jacksonville, Florida]], extending between the Pacific and Atlantic oceans). Auxiliary highways have an added digit prefixing the number of the parent highway.
 
Five route numbers are duplicated in the system; the corresponding highways are in different regions, reducing potential confusion. In addition to primary highways in the contiguous United States, there are signed Interstates in [[Hawaii]] and unsigned Interstates in [[Alaska]] and [[Puerto Rico]].
{{TOClimit|3}}
 
{{clear}}
 
==Contiguous United States==
<!-- Do not add any future routes here without discussion -->
There are 71 primary interstate highways in the 48 contiguous United States as well as five former and one future primary interstate highway. This number does not include [[List of auxiliary Interstate Highways|auxiliary Interstate Highways]].
{{routelist top|length_ref=<ref name="table1">{{cite web |title=Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of December 31, 2018 |url=https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table01.cfm |website=FHWA Route Log and Finder List |publisher=[[Federal Highway Administration]] |access-date=April 21, 2021 |date=May 6, 2019}}</ref>}}
{{routelist row
| country = USA
| type = I
| route = 2
| length_mi = 46.80
| terminus_a = [[U.S. Route 83 in Texas|US&nbsp;83]]/[[U.S. Route 83 Business (McAllen, Texas)|Bus. US&nbsp;83-S]] in [[La Joya, Texas|La Joya, TX]]
| terminus_b = [[Interstate 69E|I-69E]]/[[U.S. Route 77 in Texas|US&nbsp;77]]/[[U.S. Route 83 in Texas|US&nbsp;83]] in [[Harlingen, Texas|Harlingen, TX]]
| established = 2013
| notes = Unfinished in Texas; Texas only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 4
| length_mi = 132.30
| terminus_a = [[Interstate 275 (Florida)|I-275]] in [[Tampa, Florida|Tampa, FL]]
| terminus_b = [[#I0095|I-95]]/[[Florida State Road 400|SR&nbsp;400]] at [[Daytona Beach, Florida|Daytona Beach, FL]]
| established = 1959
| notes = Florida only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 5
| length_mi = 1,381.29
| terminus_a = [[Mexican Federal Highway 1|Fed.&nbsp;1]]/[[Mexican Federal Highway 1D|Fed.&nbsp;1D]] at [[San Diego|San Diego, CA]]
| terminus_b = [[British Columbia Highway 99|Highway&nbsp;99]] at [[Blaine, Washington|Blaine, WA]]
| established = 1956
| notes = Serves three states: [[Interstate 5 in California|California]], [[Interstate 5 in Oregon|Oregon]], [[Interstate 5 in Washington|Washington]]<br />Associated routes: [[Interstate 105 (disambiguation)|I-105]], [[Interstate 205 (disambiguation)|I-205]], [[Interstate 305 (disambiguation)|I-305]], [[Interstate 405 (disambiguation)|I-405]], [[Interstate 505|I-505]], [[Interstate 605|I-605]], [[Interstate 705|I-705]], [[Interstate 805|I-805]]; Planned: [[California State Route 905|I-905 in California]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 8
| length_mi = 350.34
| terminus_a = Sunset Cliffs Boulevard & Nimitz Boulevard in [[San Diego|San Diego, CA]]
| terminus_b = [[#I0010|I-10]] in [[Casa Grande, Arizona|Casa Grande, AZ]]
| established = 1964
| notes = Serves two states: California, Arizona
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 10
| length_mi = 2,460.34
| terminus_a = [[California State Route 1|SR&nbsp;1]] in [[Santa Monica, California|Santa Monica, CA]]
| terminus_b = [[#I0095|I-95]]/[[U.S. Route 17 in Florida|US&nbsp;17]] in [[Jacksonville, Florida|Jacksonville, FL]]
| established = 1957
| notes = Serves eight states: [[Interstate 10 in California|California]], [[Interstate 10 in Arizona|Arizona]], [[Interstate 10 in New Mexico|New Mexico]], [[Interstate 10 in Texas|Texas]], [[Interstate 10 in Louisiana|Louisiana]], [[Interstate 10 in Mississippi|Mississippi]], [[Interstate 10 in Alabama|Alabama]], [[Interstate 10 in Florida|Florida]]<br />Associated routes: [[Interstate 110 (disambiguation)|I-110]], [[Interstate 210 (disambiguation)|I-210]], [[Interstate 310 (disambiguation)|I-310]], [[Interstate 410|I-410]], [[Interstate 510|I-510]], [[Interstate 610 (disambiguation)|I-610]], [[Interstate 710|I-710]], [[U.S. Route 90 Business (New Orleans, Louisiana)|I-910]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 11
| length_mi = 54.193
| terminus_a = [[U.S. Route 93 in Nevada|US&nbsp;93]] at the [[Arizona]] state line
| terminus_b = Future [[#I0011|I-11]]/[[U.S. Route 95 in Nevada|US&nbsp;95]]/[[Nevada State Route 157|SR&nbsp;157]] in [[Las Vegas|Las Vegas, NV]]
| established = 2017
| notes = Unfinished in Nevada; Nevada only; planned in one more: Arizona
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 12
| length_mi = 85.59
| terminus_a = [[#I0010|I-10]] in [[Baton Rouge, Louisiana|Baton Rouge, LA]]
| terminus_b = I-10/[[#I0059|I-59]] in [[Slidell, Louisiana|Slidell, LA]]
| established = 1967
| notes = Louisiana only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 14
| length_mi = 25.10
| terminus_a = [[U.S. Route 190|US&nbsp;190]] & [[U.S. Route 190 Business (Copperas Cove, Texas)|US&nbsp;190 Bus.]] in [[#I0035|I-35]]/[[U.S. Route 190|US&nbsp;190]] in [[Belton, Texas|Belton, TX]]
| terminus_b = [[Interstate 35 in Texas|I-35]]/[[U.S. Route 190|US&nbsp;190]] in [[Belton, Texas|Belton, TX]]| established = January 26, 2017
| notes = Unfinished in Texas; Texas only; planned in four more: Louisiana, Mississippi, Alabama, Georgia<br />Planned associated routes: [[Interstate 14#Proposed extension|I-14N]], [[Interstate 14#Proposed extension|I-14S]], and [[Interstate 14#Interstate 214|I-214]] in Texas
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 15
| length_mi = 1,433.52
| terminus_a = [[#I0008|I-8]] & [[#I0015|SR&nbsp;15]] in [[San Diego, California|San Diego, CA]]
| terminus_b = [[Alberta Highway 4|Highway&nbsp;4]] at [[Sweetgrass, Montana|Sweetgrass, MT]]
| established = 1957
| notes = Unfinished in California; serves six states: [[Interstate 15 in California|California]], [[Interstate 15 in Nevada|Nevada]], [[Interstate 15 in Arizona|Arizona]], [[Interstate 15 in Utah|Utah]], [[Interstate 15 in Idaho|Idaho]], [[Interstate 15 in Montana|Montana]]<br />Associated routes: [[Interstate 115|I-115]], [[Interstate 215|I-215]], [[Interstate 15 Business (Great Falls, Montana)|I-315]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 16
| length_mi = 166.81
| terminus_a = [[#I0075|I-75]]/[[Fall Line Freeway|SR&nbsp;540]] in [[Macon, Georgia|Macon, GA]]
| terminus_b = Montgomery Street in [[Savannah, Georgia|Savannah, GA]]
| established = 1966
| notes = Georgia only<br />Associated route: [[Interstate 516|I-516]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 17
| length_mi = 145.93
| terminus_a = [[#I0010|I-10]]/[[U.S. Route 60 in Arizona|US&nbsp;60]] in [[Phoenix, Arizona|Phoenix, AZ]]
| terminus_b = [[#I0040|I-40]]/[[Arizona State Route 89A|SR&nbsp;89A]] in [[Flagstaff, Arizona|Flagstaff, AZ]]
| established = 1961
| notes = Arizona only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 19
| length_mi = 63.43
| terminus_a = [[Interstate 19 Business (Nogales, Arizona)|I-19 BL]] in [[Nogales, Arizona|Nogales, AZ]]
| terminus_b = [[#I0010|I-10]] in [[Tucson, Arizona|Tucson, AZ]]
| established = 1972
| notes = Arizona only<br />Uses [[Interstate 19#Signage|kilometers instead of miles]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 20
| length_mi = 1,539.38
| terminus_a = [[#I0010Texas|I-10]] in [[Reeves County, Texas|Reeves County, TX]]
| terminus_b = [[#I0095|I-95]] & [[Interstate 20 in South Carolina#Interstate 20 Business|I-20 Bus.]] in [[Florence, South Carolina|Florence, SC]]
| established = 1957
| notes = Serves six states: [[Interstate 20 in Texas|Texas]], [[Interstate 20 in Louisiana|Louisiana]], [[Interstate 20 in Mississippi|Mississippi]], [[Interstate 20 in Alabama|Alabama]], [[Interstate 20 in Georgia|Georgia]], [[Interstate 20 in South Carolina|South Carolina]]<br />Associated routes: [[Interstate 220 (disambiguation)|I-220]], [[Interstate 520|I-520]], [[Interstate 820|I-820]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 22
| length_mi = 202.22
| terminus_a = [[Interstate 269|I-269]]/[[U.S. Route 78|US&nbsp;78]]/[[Mississippi Highway 304|MS&nbsp;304]] in [[Byhalia, Mississippi|Byhalia, MS]]
| terminus_b = [[#I0065|I-65]] in [[Birmingham, Alabama|Birmingham, AL]]
| established = 2012
| notes = Unfinished in Alabama; serves two states: Mississippi, Alabama<br />Planned associated routes: [[Interstate 222|I-222]] and [[Interstate 422|I-422]] in Alabama
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 24
| length_mi = 316.36
| terminus_a = [[#I0057|I-57]] in [[Pulley's Mill, Illinois|Pulley's Mill, IL]]
| terminus_b = [[#I0075|I-75]]/[[U.S. Route 74|US&nbsp;74]] in [[East Ridge, Tennessee|East Ridge, TN]]
| established = 1962
| notes = Serves four states: Illinois, Kentucky, Tennessee, Georgia<br />Associated route: [[Interstate 124|I-124]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 25
| length_mi = 1,061.67
| terminus_a = [[#I0010|I-10]]/[[U.S. Route 85|US&nbsp;85]]/[[U.S. Route 180|US&nbsp;180]] in [[Las Cruces, New Mexico|Las Cruces, NM]]
| terminus_b = [[#I0090|I-90]]/[[U.S. Route 87|US&nbsp;87]] in [[Buffalo, Wyoming|Buffalo, WY]]
| established = 1957
| notes = Serves three states: [[Interstate 25 in New Mexico|New Mexico]], [[Interstate 25 in Colorado|Colorado]], [[Interstate 25 in Wyoming|Wyoming]]<br />Associated route: [[Interstate 225|I-225]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 26
| length_mi = 328.09
| terminus_a = [[U.S. Route 11W|US&nbsp;11W]]/[[U.S. Route 23|US&nbsp;23]] in [[Kingsport, Tennessee|Kingsport, TN]]<hr>[[#I0040|I-40]]/[[Interstate 240 (North Carolina)|I-240]]/[[U.S. Route 74|US&nbsp;74]] in [[Asheville, North Carolina|Asheville, NC]]
| terminus_b = [[U.S. Route 19|US&nbsp;19]]/[[U.S. Route 23|US&nbsp;23]] south of [[Forks of Ivy, North Carolina|Forks of Ivy, NC]]<hr>[[U.S. Route 17|US&nbsp;17]] in [[Charleston, South Carolina|Charleston, SC]]
| established = 1960
| notes = Unfinished in North Carolina; serves three states: [[Interstate 26 in Tennessee|Tennessee]], [[Interstate 26 in North Carolina|North Carolina]], [[Interstate 26 in South Carolina|South Carolina]]<br />Associated routes: [[Interstate 126|I-126]], [[Interstate 526|I-526]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 27
| length_mi = 128.332
| terminus_a = [[U.S. Route 87|US&nbsp;87]] in [[Lubbock, Texas|Lubbock, TX]]
| terminus_b = [[#I0040|I-40]]/[[U.S. Route 60|US&nbsp;60]]/[[U.S. Route 87|US&nbsp;87]]/[[U.S. Route 287|US&nbsp;287]] in [[Amarillo, Texas|Amarillo, TX]]
| established = 1969
| notes = Unfinished in Texas; Texas only; planned in one more: New Mexico; Planned associated routes in Texas: [[Interstate 27E|I-27E]], [[Interstate 27W|I-27W]], [[Interstate 27N|I-27N]]<!-- Do not unhide until the bill is signed into law --><!-- PL 118-45 was signed March 22, 2024 --><ref>{{cite web |last1=United States Congress |title=Text - S.992 - 118th Congress (2023-2024): I-27 Numbering Act of 2023 |url=https://www.congress.gov/bill/118th-congress/senate-bill/992/text |website=Congress.gov |date=March 22, 2024 |publisher=Library of Congress |access-date=21 February 2025}}</ref>
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 29
| length_mi = 750.58
| terminus_a = [[#I0035|I-35]]/[[#I0070|I-70]]/[[U.S. Route 24|US&nbsp;24]]/[[U.S. Route 40|US&nbsp;40]]/[[U.S. Route 71|US&nbsp;71]] in [[Kansas City, Missouri|Kansas City, MO]]
| terminus_b = [[Manitoba Highway 75|PTH&nbsp;75]] at [[Pembina, North Dakota|Pembina, ND]]
| established = 1958
| notes = Serves four states: [[Interstate 29 in Missouri|Missouri]], [[Interstate 29 in Iowa|Iowa]], [[Interstate 29 in South Dakota|South Dakota]], [[Interstate 29 in North Dakota|North Dakota]]<br />Associated routes: [[Interstate 129|I-129]], [[Interstate 229 (disambiguation)|I-229]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 30
| length_mi = 366.76
| terminus_a = [[#I0020|I-20]] northeast of [[Aledo, Texas|Aledo, TX]]
| terminus_b = [[#I0040|I-40]]/[[U.S. Route 65|US&nbsp;65]]/[[U.S. Route 67|US&nbsp;67]]/[[U.S. Route 167|US&nbsp;167]]/[[Arkansas Highway 107|AR&nbsp;107]] in [[North Little Rock, Arkansas|North Little Rock, AR]]
| established = 1957
| notes = Serves two states: Texas, Arkansas<br />Associated routes: [[Interstate 430|I-430]], [[Interstate 530|I-530]], [[Interstate 630|I-630]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 31
| length_mi =
| terminus_a = [[#I0094|I-94]] in [[Fargo, North Dakota|Fargo, ND]]
| terminus_b = [[U.S. Route 81|US&nbsp;81]] & [[Manitoba Highway 75|PTH&nbsp;75]] at [[Pembina, North Dakota|Pembina, ND]]
| established = 1957
| established_ref =
| circa_established =
| decommissioned = 1958
| decommissioned_ref =
| notes = Served North Dakota only <br />Replaced by a northward extension of I-29
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 35
| length_mi = 1,569.06
| terminus_a = [[U.S. Route 83|US&nbsp;83]] in [[Laredo, Texas|Laredo, TX]]<hr>[[Interstate 35W (Texas)|I-35W]] & [[Interstate 35E (Texas)|I-35E]] in [[Denton, Texas|Denton, TX]]<hr>[[Interstate 35W (Minnesota)|I-35W]] & [[Interstate 35E (Minnesota)|I-35E]] in [[Columbus, Minnesota|Columbus, MN]]
| terminus_b = I-35W & I-35E in [[Hillsboro, Texas|Hillsboro, TX]]<hr>I-35W & I-35E in [[Burnsville, Minnesota|Burnsville, MN]]<hr>[[Minnesota State Highway 61|MN&nbsp;61]] in [[Duluth, Minnesota|Duluth, MN]]
| established = 1956
| notes = Serves six states: [[Interstate 35 in Texas|Texas]], [[Interstate 35 in Oklahoma|Oklahoma]], [[Interstate 35 in Kansas|Kansas]], [[Interstate 35 in Missouri|Missouri]], [[Interstate 35 in Iowa|Iowa]], [[Interstate 35 in Minnesota|Minnesota]]<br />Associated routes: [[Interstate 35E (disambiguation)|I-35E]], [[Interstate 35W (disambiguation)|I-35W]], [[Interstate 135|I-135]], [[Interstate 235 (disambiguation)|I-235]], [[Interstate 335 (disambiguation)|I-335]], [[Interstate 435|I-435]], [[Interstate 535|I-535]], [[Interstate 635 (disambiguation)|I-635]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 37
| length_mi = 143.00
| terminus_a = [[U.S. Route 181|US&nbsp;181]]/[[Texas State Highway 35|SH&nbsp;35]] in [[Corpus Christi, Texas|Corpus Christi, TX]]
| terminus_b = [[#I0035|I-35]]/[[U.S. Route 281|US&nbsp;281]] in [[San Antonio, Texas|San Antonio, TX]]
| established = 1959
| notes = Texas only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 39
| length_mi = 306.14
| terminus_a = [[#I0055|I-55]]/[[U.S. Route 51|US&nbsp;51]] in [[Normal, Illinois|Normal, IL]]
| terminus_b = [[U.S. Route 51|US&nbsp;51]]/[[Wisconsin Highway 29|WIS&nbsp;29]] west of [[Rothschild, Wisconsin|Rothschild, WI]]
| established = 1984
| notes = Serves two states: Illinois, Wisconsin
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 40
| length_mi = 2,556.61
| terminus_a = [[#I0015|I-15]] in [[Barstow, California|Barstow, CA]]
| terminus_b = [[U.S. Route 117|US&nbsp;117]] in [[Wilmington, North Carolina|Wilmington, NC]]
| established = 1957
| notes = Serves eight states: [[Interstate 40 in California|California]], [[Interstate 40 in Arizona|Arizona]], [[Interstate 40 in New Mexico|New Mexico]], [[Interstate 40 in Texas|Texas]], [[Interstate 40 in Oklahoma|Oklahoma]], [[Interstate 40 in Arkansas|Arkansas]], [[Interstate 40 in Tennessee|Tennessee]], [[Interstate 40 in North Carolina|North Carolina]]<br />Associated routes: [[Interstate 140 (disambiguation)|I-140]], [[Interstate 240 (disambiguation)|I-240]], [[Interstate 440 (disambiguation)|I-440]], [[Interstate 540 (disambiguation)|I-540]], [[Interstate 640|I-640]], [[Interstate 840 (disambiguation)|I-840]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 41
| length_mi = 175.00
| terminus_a = [[#I0094|I-94]]/[[U.S. Route 41|US&nbsp;41]] in [[Russell, Illinois|Russell, IL]]
| terminus_b = [[#I0043|I-43]]/[[U.S. Route 41|US&nbsp;41]]/[[U.S. Route 141|US&nbsp;141]] in [[Howard, Wisconsin|Howard, WI]]
| established = 2015
| notes = Serves two states: Illinois, Wisconsin
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 42
| dab = Oklahoma–Arkansas
| length_mi = 190
| terminus_a = [[#I0035|I-35]] in [[Noble County, Oklahoma|Noble County, OK]]
| terminus_b = [[#I0049|I-49]] in [[Springdale, Arkansas|Springdale, AR]]
| established = proposed
| notes = Future Interstate; will serve two states: Oklahoma, Arkansas
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 42
| dab = North Carolina
| length_mi = 31.5
| terminus_a = [[#I0040|I-40]]/[[North Carolina Highway 540|NC&nbsp;540]] southeast of [[Garner, North Carolina|Garner, NC]]<hr>[[U.S. Route 70|US&nbsp;70]] in [[Goldsboro, North Carolina|Goldsboro, NC]]
| terminus_b = [[U.S. Route 70|US&nbsp;70]]/[[U.S. Route 70 Business (Smithfield, North Carolina)|US&nbsp;70 Bus.]] southeast of [[Clayton, North Carolina|Clayton, NC]]<hr>[[U.S. Route 70|US&nbsp;70]] in [[La Grange, North Carolina|La Grange, NC]]
| established = 2024
| notes = Unfinished in North Carolina; North Carolina only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 43
| length_mi = 191.55
| terminus_a = [[#I0039|I-39]]/[[#I0090|I-90]] in [[Beloit, Wisconsin|Beloit, WI]]
| terminus_b = [[#I0041|I-41]]/[[U.S. Route 41|US&nbsp;41]]/[[U.S. Route 141|US&nbsp;141]] in [[Howard, Wisconsin|Howard, WI]]
| established = 1981
| notes = Wisconsin only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 44
| length_mi = 636.69
| terminus_a = [[U.S. Route 82|US&nbsp;82]]/[[U.S. Route 277|US&nbsp;277]]/[[U.S. Route 281|US&nbsp;281]]/[[U.S. Route 287|US&nbsp;287]] in [[Wichita Falls, Texas|Wichita Falls, TX]]
| terminus_b = [[#I0070|I-70]] in [[St. Louis, Missouri|St. Louis, MO]]
| established = 1958
| notes = Serves three states: [[Interstate 44 in Texas|Texas]], [[Interstate 44 in Oklahoma|Oklahoma]], [[Interstate 44 in Missouri|Missouri]]<br />Associated routes: [[Interstate 244|I-244]], [[Interstate 344|I-344]], [[Interstate 444|I-444]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 45
| length_mi = 284.91
| terminus_a = [[Texas State Highway 87|SH&nbsp;87]]/[[Texas State Highway Spur 342|Spur&nbsp;342]] in [[Galveston, Texas|Galveston, TX]]
| terminus_b = [[#I0030|I-30]]/[[Interstate 345|I-345]]/[[U.S. Route 67|US&nbsp;67]] in [[Dallas, Texas|Dallas, TX]]
| established = 1971
| notes = Texas only<br />Associated route: [[Interstate 345|I-345]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 49
| length_mi = 547.52
| terminus_a = [[#I0010|I-10]]/[[U.S. Route 167|US&nbsp;167]]/[[Louisiana Highway 182|LA&nbsp;182]] in [[Lafayette, Louisiana|Lafayette, LA]]<hr>[[Interstate 220 (Louisiana)|I-220]] in [[Shreveport, Louisiana|Shreveport, LA]]<hr>[[Interstate 40|I-40]]/[[U.S. Route 71|US&nbsp;71]] at [[Alma, Arkansas|Alma, AR]]
| terminus_b = [[#I0020|I-20]] in [[Shreveport, Louisiana|Shreveport, LA]]<hr>[[U.S. Route 59|US&nbsp;59]]/[[U.S. Route 71|US&nbsp;71]] in [[Texarkana|Texarkana, AR]]<hr>[[Interstate 435|I-435]]/[[Interstate 470 (Missouri)|I-470]]/[[U.S. Route 50|US&nbsp;50]]/[[U.S. Route 71|US&nbsp;71]] in [[Kansas City, Missouri|Kansas City, MO]]
| established = 1984
| notes = Unfinished in Arkansas and Louisiana; serves three states: [[Interstate 49 in Louisiana|Louisiana]], [[Interstate 49 in Arkansas|Arkansas]], [[Interstate 49 in Missouri|Missouri]]; planned in one more: Texas
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 55
| length_mi = 964.25
| terminus_a = [[#I0010|I-10]] in [[LaPlace, Louisiana|LaPlace, LA]]
| terminus_b = [[U.S. Route 41|US&nbsp;41]] in [[Chicago, Illinois|Chicago, IL]]
| established = 1960
| notes = Serves six states: [[Interstate 55 in Louisiana|Louisiana]], [[Interstate 55 in Mississippi|Mississippi]], [[Interstate 55 in Tennessee|Tennessee]], [[Interstate 55 in Arkansas|Arkansas]], [[Interstate 55 in Missouri|Missouri]], [[Interstate 55 in Illinois|Illinois]]<br />Associated routes: [[Interstate 155 (disambiguation)|I-155]], [[Interstate 255|I-255]], [[Interstate 355|I-355]], [[Interstate 555|I-555]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 57
| length_mi = 508.92
| terminus_a = [[#I0040|I-40]]/[[U.S. Route 67|US&nbsp;67]]/[[U.S. Route 167|US&nbsp;167]] in [[North Little Rock, Arkansas|North Little Rock, AR]]<hr>[[Interstate 55|I-55]]/[[U.S. Route 60|US&nbsp;60]] in [[Sikeston, Missouri|Sikeston, MO]]
| terminus_b = [[U.S. Route 67|US&nbsp;67]]/[[U.S. Route 412|US&nbsp;412]]/[[Special routes of U.S. Route 412|US 412B]] in [[Walnut Ridge, Arkansas|Walnut Ridge, AR]]<hr>[[Interstate 94|I-94]] in [[Chicago, Illinois|Chicago, IL]]
| established = 1965
| notes = Unfinished in Missouri and Arkansas; serves three states: Arkansas, Missouri, Illinois.
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 59
| length_mi = 445.23
| terminus_a = [[#I0010|I-10]]/[[Interstate 12|I-12]] in [[Slidell, Louisiana|Slidell, LA]]
| terminus_b = [[#I0024|I-24]] in [[Wildwood, Georgia|Wildwood, GA]]
| established = 1960
| notes = Serves four states: Louisiana, Mississippi, Alabama, Georgia<br />Associated routes: [[Interstate 359|I-359]], [[Interstate 459|I-459]], [[Interstate 759|I-759]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 64
| length_mi = 963.52
| terminus_a = [[#I0070|I-70]]/[[U.S. Route 40|US&nbsp;40]]/[[U.S. Route 61|US&nbsp;61]] in [[Wentzville, Missouri|Wentzville, MO]]
| terminus_b = [[Interstate 264 (Virginia)|I-264]]/[[Interstate 664|I-664]]/[[U.S. Route 13|US&nbsp;13]]/[[U.S. Route 58|US&nbsp;58]]/[[U.S. Route 460|US&nbsp;460]] in [[Chesapeake, Virginia|Chesapeake, VA]]
| established = 1961
| notes = Serves six states: [[Interstate 64 in Missouri|Missouri]], [[Interstate 64 in Illinois|Illinois]], [[Interstate 64 in Indiana|Indiana]], [[Interstate 64 in Kentucky|Kentucky]], [[Interstate 64 in West Virginia|West Virginia]], [[Interstate 64 in Virginia|Virginia]]<br />Associated routes: [[Interstate 264 (disambiguation)|I-264]], [[Interstate 464|I-464]], [[Interstate 564|I-564]], [[Interstate 664|I-664]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 65
| length_mi = 887.30
| terminus_a = [[#I0010|I-10]] in [[Mobile, Alabama|Mobile, AL]]
| terminus_b = [[U.S. Route 12|US&nbsp;12]]/[[U.S. Route 20|US&nbsp;20]] in [[Gary, Indiana|Gary, IN]]
| established = 1958
| notes = Serves four states: [[Interstate 65 in Alabama|Alabama]], [[Interstate 65 in Tennessee|Tennessee]], [[Interstate 65 in Kentucky|Kentucky]], [[Interstate 65 in Indiana|Indiana]]<br />Associated routes: [[Interstate 165 (disambiguation)|I-165]], [[Interstate 265|I-265]], [[Interstate 465|I-465]], [[Interstate 565|I-565]], [[Interstate 865|I-865]]; Planned: [[Cumberland Parkway|I-365 in Kentucky]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 66
| dab = Kansas–Kentucky
| length_mi =
| terminus_a = [[Wichita, Kansas|Wichita, KS]]
| terminus_b = Near [[Pikeville, Kentucky|Pikeville, KY]]
| established = 1991
| established_ref =
| circa_established =
| decommissioned = 2015
| decommissioned_ref = <ref>{{Cite press release |first= Carrie |last= Nelsen |title= For Immediate Release |url= http://www.66corridor.org/doclib/docs%5C2015-07-09PressRelease.pdf |archive-url= https://web.archive.org/web/20150906094950/http://www.66corridor.org/doclib/docs%5C2015-07-09PressRelease.pdf |url-status= dead |archive-date= September 6, 2015 |publisher= Illinois Department of Transportation |date= July 9, 2015 }}</ref>
| notes = Served four states: Kansas, Missouri, Illinois, Kentucky<br />Associated routes: I-66 Spur in Kentucky<br />The project was unpopular and ultimately cancelled without the interstate being completed; I-66 Spur eventually became [[Interstate 165 (Kentucky)|I-165]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 66
| length_mi = 76.28
| terminus_a = [[#I0081|I-81]] southwest of [[Middletown, Virginia|Middletown, VA]]
| terminus_b = [[U.S. Route 29|US&nbsp;29]] in [[Washington, D.C.]]
| established = 1961
| notes = Serves DC and one state: Virginia
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 68
| length_mi = 113.15
| terminus_a = [[#I0079|I-79]] in [[Morgantown, West Virginia|Morgantown, WV]]
| terminus_b = [[#I0070|I-70]]/[[U.S. Route 40|US&nbsp;40]]/[[U.S. Route 522|US&nbsp;522]] in [[Hancock, Maryland|Hancock, MD]]
| established = 1991
| notes = Serves two states: West Virginia, Maryland
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 69
| length_mi = 910.10
| terminus_a = [[U.S. Route 59|US&nbsp;59]] in [[Rosenberg, Texas|Rosenberg, TX]]<hr>[[Mississippi Highway 713|MS&nbsp;713]] southwest of [[Banks, Mississippi|Banks, MS]]<hr>[[U.S. Route 51|US&nbsp;51]] in [[Fulton, Kentucky|Fulton, KY]]<hr>[[U.S. Route 41|US&nbsp;41]] in [[Evansville, Indiana|Evansville, IN]]
| terminus_b = [[U.S. Route 59|US&nbsp;59]] in [[Splendora, Texas|Splendora, TX]]<hr>[[U.S. Route 51|US&nbsp;51]] in [[Memphis, Tennessee|Memphis, TN]]<hr>[[U.S. Route 41|US&nbsp;41]] in [[Henderson, Kentucky|Henderson, KY]]<hr>[[Ontario Highway 402|Hwy&nbsp;402]] at [[Port Huron, Michigan|Port Huron, MI]]
| established = 1957
| notes = {{plainlist|1=
* Unfinished in Texas, Mississippi, Tennessee, Kentucky, and Indiana; serves six states: [[Interstate 69 in Texas|Texas]], [[Interstate 69 in Mississippi|Mississippi]], [[Interstate 69 in Tennessee|Tennessee]], [[Interstate 69 in Kentucky|Kentucky]], [[Interstate 69 in Indiana|Indiana]], [[Interstate 69 in Michigan|Michigan]]
* Planned/started in 2 more: [[Interstate 69 in Louisiana|Louisiana]], [[Interstate 69 in Arkansas|Arkansas]]
* Associated routes: [[Interstate 69C|I-69C]], [[Interstate 69E|I-69E]], [[Interstate 69W|I-69W]], [[Interstate 169 (disambiguation)|I-169]], [[Interstate 269|I-269]], [[Interstate 369 (Texas)|I-369]], [[Interstate 469|I-469]]; Planned: [[Western Kentucky Parkway|I-569 in Kentucky]]
}}
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 70
| length_mi = 2,171.71
| terminus_a = [[#I0015|I-15]] in [[Cove Fort, Utah|Cove Fort, UT]]
| terminus_b = [[Interstate 695 (Maryland)|I-695]] in [[Woodlawn, Baltimore County, Maryland|Woodlawn, MD]]
| established = 1956
| notes = Serves 10 states: [[Interstate 70 in Utah|Utah]], [[Interstate 70 in Colorado|Colorado]], [[Interstate 70 in Kansas|Kansas]], [[Interstate 70 in Missouri|Missouri]], [[Interstate 70 in Illinois|Illinois]], [[Interstate 70 in Indiana|Indiana]], [[Interstate 70 in Ohio|Ohio]], [[Interstate 70 in West Virginia|West Virginia]], [[Interstate 70 in Pennsylvania|Pennsylvania]], [[Interstate 70 in Maryland|Maryland]]<br />Associated routes: [[Interstate 170|I-170]], [[Interstate 270 (disambiguation)|I-270]], [[Interstate 370|I-370]], [[Interstate 470 (disambiguation)|I-470]], [[Interstate 670 (disambiguation)|I-670]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 71
| length_mi = 345.57
| terminus_a = [[#I0064|I-64]]/[[#I0065|I-65]] in [[Louisville, Kentucky|Louisville, KY]]
| terminus_b = [[#I0090|I-90]] & [[Interstate 490 (Ohio)|I-490]] in [[Cleveland, Ohio|Cleveland, OH]]
| established = 1959
| notes = Serves two states: Kentucky, Ohio<br />Associated routes: [[Interstate 271|I-271]], [[Interstate 471|I-471]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 72
| length_mi = 179.29
| terminus_a = [[U.S. Route 36|US&nbsp;36]]/[[Special routes of U.S. Route 36 in Missouri|US 36 Bus.]]/[[U.S. Route 61|US&nbsp;61]] ([[Avenue of the Saints]])/[[Chicago–Kansas City Expressway|Route 110 (CKC)]] in [[Hannibal, Missouri|Hannibal, MO]]
| terminus_b = University Avenue & Church Street in [[Champaign, Illinois|Champaign, IL]]
| established = 1970
| notes = Serves two states: Missouri, Illinois <br />Associated route: [[Interstate 172|I-172]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 73
| length_mi = 101.10
| terminus_a = [[#I0074|I‑74]]/[[U.S. Route 74|US&nbsp;74]]/[[Special routes of U.S. Route 74|US&nbsp;74 Bus.]] west of [[Rockingham, North Carolina|Rockingham, NC]]
| terminus_b = [[U.S. Route 220|US&nbsp;220]]/[[North Carolina Highway 68|NC&nbsp;68]] northeast of [[Stokesdale, North Carolina|Stokesdale, NC]]
| established = 1997
| notes = Unfinished in North Carolina; [[Interstate 73 in North Carolina|North Carolina]] only; planned in five more: [[Interstate 73 in South Carolina|South Carolina]], [[Interstate 73 in Virginia|Virginia]], West Virginia, Ohio, Michigan
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 74
| length_mi = 541.62
| terminus_a = [[#I0080|I-80]] in [[Davenport, Iowa|Davenport, IA]]<hr>[[#I0077|I-77]] at the [[Virginia]] state line northwest of [[Pine Ridge, Surry County, North Carolina|Pine Ridge, NC]]<hr>[[#I0040|I-40]] in [[Winston-Salem, North Carolina|Winston-Salem, NC]]<hr>[[U.S. Route 74 Alternate (Maxton–Lumberton, North Carolina)|US&nbsp;74 Alt.]]/[[U.S. Route 74 Business (Laurinburg–Maxton, North Carolina)|US&nbsp;74 Bus.]] in [[Maxton, North Carolina|Maxton, NC]]
| terminus_b = [[#I0075|I-75]]/[[U.S. Route 52|US&nbsp;52]] in [[Cincinnati, Ohio|Cincinnati, OH]]<hr>[[U.S. Route 52|US&nbsp;52]] in [[Mount Airy, North Carolina|Mount Airy, NC]]<hr>[[U.S. Route 74 Business (Rockingham–Hamlet, North Carolina)|US&nbsp;74 Bus.]] northwest of [[Hamlet, North Carolina|Hamlet, NC]]<hr>[[U.S. Route 74|US&nbsp;74]] southwest of [[Lumberton, North Carolina|Lumberton, NC]]
| established = 1974
| notes = Unfinished in Ohio and North Carolina; serves five states: [[Interstate 74 in Iowa|Iowa]], [[Interstate 74 in Illinois|Illinois]], [[Interstate 74 in Indiana|Indiana]], [[Interstate 74 in Ohio|Ohio]], [[Interstate 74 in North Carolina|North Carolina]]; planned in three more: West Virginia, Virginia, South Carolina<br />Associated routes: [[Interstate 474|I-474]]; Planned: [[Winston-Salem Northern Beltway#Interstate 274|I-274 in North Carolina]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 75
| length_mi = 1,786.47
| terminus_a = [[Florida State Road 826|SR&nbsp;826]]/[[Florida State Road 924|SR&nbsp;924]] in [[Miami Lakes, Florida|Miami Lakes, FL]]
| terminus_b = [[Sault Ste. Marie International Bridge|International Bridge]] at [[Sault Ste. Marie, Michigan|Sault Ste. Marie, MI]]
| established = 1958
| notes = Serves six states: [[Interstate 75 in Florida|Florida]], [[Interstate 75 in Georgia|Georgia]], [[Interstate 75 in Tennessee|Tennessee]], [[Interstate 75 in Kentucky|Kentucky]], [[Interstate 75 in Ohio|Ohio]], [[Interstate 75 in Michigan|Michigan]]<br />Associated routes: [[Interstate 175|I-175]], [[Interstate 275 (disambiguation)|I-275]], [[Interstate 375 (disambiguation)|I-375]], [[Interstate 475 (disambiguation)|I-475]], [[Interstate 575|I-575]], [[Interstate 675 (disambiguation)|I-675]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 76
| dab = Colorado–Nebraska
| length_mi = 187.29
| terminus_a = [[#I0070|I-70]] in [[Arvada, Colorado|Arvada, CO]]
| terminus_b = [[#I0080|I-80]] at [[Big Springs, Nebraska|Big Springs, NE]]
| established = 1975
| notes = Serves two states: Colorado, Nebraska
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 76
| dab = Ohio–New Jersey
| length_mi = 435.66
| terminus_a = [[#I0071|I-71]]/[[U.S. Route 224|US&nbsp;224]] in [[Westfield Township, Medina County, Ohio|Westfield Township, OH]]
| terminus_b = [[Interstate 295 (Delaware-New Jersey)|I-295]]/[[New Jersey State Route 42|Route&nbsp;42]] in [[Bellmawr, New Jersey|Bellmawr, NJ]]
| established = 1964
| notes = Serves three states: [[Interstate 76 in Ohio|Ohio]], [[Interstate 76 in Pennsylvania|Pennsylvania]], [[Interstate 76 in New Jersey|New Jersey]]<br />Associated routes: [[Interstate 176|I-176]], [[Interstate 276|I-276]], [[Interstate 376|I-376]], [[Interstate 476|I-476]], [[Interstate 676|I-676]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 77
| length_mi = 610.10
| terminus_a = [[#I0026|I-26]] in [[Cayce, South Carolina|Cayce, SC]]
| terminus_b = [[#I0090|I-90]] in [[Cleveland, Ohio|Cleveland, OH]]
| established = 1958
| notes = Serves five states: [[Interstate 77 in South Carolina|South Carolina]], [[Interstate 77 in North Carolina|North Carolina]], [[Interstate 77 in Virginia|Virginia]], [[Interstate 77 in West Virginia|West Virginia]], [[Interstate 77 in Ohio|Ohio]]<br />Associated route: [[Interstate 277 (disambiguation)|I-277]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 78
| length_mi = 146.28
| terminus_a = [[#I0081|I-81]] in [[Union Township, Lebanon County, Pennsylvania|Union Township, PA]]
| terminus_b = [[Canal Street (Manhattan)|Canal Street]] in [[New York, New York|New York, NY]]
| established = 1957
| notes = Serves three states: [[Interstate 78 in Pennsylvania|Pennsylvania]], [[Interstate 78 in New Jersey|New Jersey]], [[Interstate 78 in New York|New York]]<br />Associated routes: [[Interstate 278|I-278]], [[Interstate 478|I-478]], [[Interstate 678|I-678]], [[Interstate 878|I-878]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 79
| length_mi = 343.46
| terminus_a = [[#I0077|I-77]] in [[Charleston, West Virginia|Charleston, WV]]
| terminus_b = [[Pennsylvania Route 5|PA 5]]/[[Pennsylvania Route 290|PA 290]]/Bayfront Parkway in [[Erie, Pennsylvania|Erie, PA]]
| established = 1967
| notes = Serves two states: West Virginia, Pennsylvania<br />Associated routes: [[Interstate 279|I-279]], [[Interstate 579|I-579]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 80
| length_mi = 2,900.76
| terminus_a = [[U.S. Route 101|US&nbsp;101]] in [[San Francisco, California|San Francisco, CA]]
| terminus_b = [[#I0095|I-95]] in [[Teaneck, New Jersey|Teaneck, NJ]]
| established = 1956
| notes = Serves 11 states: [[Interstate 80 in California|California]], [[Interstate 80 in Nevada|Nevada]], [[Interstate 80 in Utah|Utah]], [[Interstate 80 in Wyoming|Wyoming]], [[Interstate 80 in Nebraska|Nebraska]], [[Interstate 80 in Iowa|Iowa]], [[Interstate 80 in Illinois|Illinois]], [[Interstate 80 in Indiana|Indiana]], [[Interstate 80 in Ohio|Ohio]], [[Interstate 80 in Pennsylvania|Pennsylvania]], [[Interstate 80 in New Jersey|New Jersey]]<br />Associated routes: [[Interstate 180 (disambiguation)|I-180]], [[Interstate 238|I-238]], [[Interstate 280 (disambiguation)|I-280]], [[Interstate 380 (disambiguation)|I-380]], [[Interstate 480 (disambiguation)|I-480]], [[Interstate 580 (disambiguation)|I-580]], [[Interstate 680 (disambiguation)|I-680]], [[Interstate 780|I-780]], [[Interstate 880 (disambiguation)|I-880]], [[Interstate 980|I-980]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 81
| length_mi = 855.02
| terminus_a = [[#I0040|I-40]] in [[Dandridge, Tennessee|Dandrige, TN]]
| terminus_b = [[Ontario Highway 137|Hwy&nbsp;137]] at [[Wellesley Island|Wellesley Island, NY]]
| established = 1961
| notes = Serves six states: [[Interstate 81 in Tennessee|Tennessee]], [[Interstate 81 in Virginia|Virginia]], [[Interstate 81 in West Virginia|West Virginia]], [[Interstate 81 in Maryland|Maryland]], [[Interstate 81 in Pennsylvania|Pennsylvania]], [[Interstate 81 in New York|New York]]<br />Associated routes: [[Interstate 381|I-381]], [[Interstate 481|I-481]], [[Interstate 581|I-581]], [[Interstate 781|I-781]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 82
| length_mi = 143.58
| terminus_a = [[#I0090|I-90]]/[[U.S. Route 97|US&nbsp;97]] in [[Ellensburg, Washington|Ellensburg, WA]]
| terminus_b = [[Interstate 84 (Oregon–Utah)|I-84]]/[[U.S. Route 30|US&nbsp;30]] in [[Hermiston, Oregon|Hermiston, OR]]
| established = 1957
| notes = Serves two states: Washington, Oregon<br />Associated route: [[Interstate 182|I-182]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 82
| dab = Pennsylvania–New York
| length_mi =
| terminus_a = [[#I0081|I-81]]/[[Interstate 84 (Pennsylvania-Massachusetts)|I-84]]/[[U.S. Route 6|US&nbsp;6]] in [[Scranton, Pennsylvania|Scranton, PA]]
| terminus_b = [[#I0095|I-95]] in [[Teaneck, New Jersey|Teaneck, NJ]]
| established = 1957
| established_ref =
| circa_established =
| decommissioned = 1958
| decommissioned_ref =
| notes = Served two states: Pennsylvania, New Jersey<br />Was the initial designation to what is now [[Interstate 380 (Pennsylvania)|I-380]] and [[Interstate 80|I-80]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 82
| dab = Connecticut–Rhode Island
| length_mi =
| terminus_a = [[Interstate 84 (Pennsylvania-Massachusetts)|I-84]] in [[East Hartford, Connecticut|East Hartford, CT]]
| terminus_b = [[Providence, Rhode Island|Providence, RI]]
| established = 1956
| established_ref =
| circa_established =
| decommissioned = 1968
| decommissioned_ref =
| notes = Served one state: Connecticut, was planned for one state: Rhode Island<br />Redesignated as I-84 in 1968
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 83
| length_mi = 85.03
| terminus_a = President Street & Fayette Street in [[Baltimore, Maryland|Baltimore, MD]]
| terminus_b = [[#I0081|I-81]]/[[U.S. Route 322|US&nbsp;322]] north of [[Progress, Pennsylvania|Progress, PA]]
| established = 1959
| notes = Serves two states: Maryland, Pennsylvania<br />Associated route: [[Interstate 283|I-283]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 84
| dab = Oregon–Utah
| length_mi = 769.62
| terminus_a = [[#I0005|I-5]]/[[U.S. Route 30|US&nbsp;30]] in [[Portland, Oregon|Portland, OR]]
| terminus_b = [[#I0080|I-80]]/[[U.S. Route 189|US&nbsp;189]] in [[Echo, Utah|Echo, UT]]
| established = 1980
| notes = Serves three states: [[Interstate 84 in Oregon|Oregon]], [[Interstate 84 in Idaho|Idaho]], [[Interstate 84 in Utah|Utah]]<br />Associated route: [[Interstate 184|I-184]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 84
| dab = Pennsylvania–Massachusetts
| length_mi = 232.71
| terminus_a = [[#I0081|I-81]]/[[Interstate 380 (Pennsylvania)|I-380]]/[[U.S. Route 6|US&nbsp;6]] in [[Dunmore, Pennsylvania|Dunmore, PA]]
| terminus_b = [[#I0090|I-90]]/[[Massachusetts Turnpike]] in [[Sturbridge, Massachusetts|Sturbridge, MA]]
| established = 1963
| notes = Serves four states: [[Interstate 84 in Pennsylvania|Pennsylvania]], [[Interstate 84 in New York|New York]], [[Interstate 84 in Connecticut|Connecticut]], [[Interstate 84 in Massachusetts|Massachusetts]]<br />Associated routes: [[Interstate 384|I-384]], [[Interstate 684|I-684]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 85
| length_mi = 666.05
| terminus_a = [[#I0065|I-65]]/[[U.S. Route 82|US&nbsp;82]] in [[Montgomery, Alabama|Montgomery, AL]]
| terminus_b = [[#I0095|I-95]]/[[U.S. Route 460|US&nbsp;460]] in [[Petersburg, Virginia|Petersburg, VA]]
| established = 1958
| notes = Unfinished in Alabama; serves five states: [[Interstate 85 in Alabama|Alabama]], [[Interstate 85 in Georgia|Georgia]], [[Interstate 85 in South Carolina|South Carolina]], [[Interstate 85 in North Carolina|North Carolina]], [[Interstate 85 in Virginia|Virginia]]<br />Associated routes: [[Interstate 185 (disambiguation)|I-185]], [[Interstate 285 (disambiguation)|I-285]], [[Interstate 385|I-385]], [[Interstate 485|I-485]], [[Interstate 585|I-585]], [[Interstate 785|I-785]], [[Interstate 885|I-885]], [[Interstate 985|I-985]]; Future/Planned: [[Interstate 685 (disambiguation)|I-685]] in both [[Interstate 685 (Alabama)|Alabama]] and [[Interstate 685 (North Carolina)|North Carolina]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 86
| dab = Idaho
| length_mi = 62.85
| terminus_a = [[Interstate 84 (Oregon–Utah)|I-84]]/[[U.S. Route 30|US&nbsp;30]] northeast of [[Declo, Idaho|Declo, ID]]
| terminus_b = [[#I0015|I-15]] in [[Chubbuck, Idaho|Chubbuck, ID]]
| established = 1980
| notes = Idaho only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 86
| dab = Pennsylvania–New York
| length_mi = 254.02
| terminus_a = {{nowrap|[[#I0090|I-90]] in [[Greenfield Township, Erie County, Pennsylvania|Greenfield Township, PA]]}}<hr>[[#I0081|I-81]]/[[New York State Route 17|NY&nbsp;17]]/[[ List of reference routes in New York|NY 990G]] in [[Kirkwood, New York|Kirkwood, NY]]
| terminus_b = NY&nbsp;17/[[New York State Route 26|NY&nbsp;26]] in [[Vestal, New York|Vestal, NY]]<hr>NY&nbsp;17/[[New York State Route 79|NY&nbsp;79]] in [[Windsor (village), New York|Windsor, NY]]
| established = 1999
| notes = Unfinished in New York; serves two states: Pennsylvania, New York
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 86
| dab = Connecticut–Massachusetts
| length_mi = 38.97
| terminus_a = [[Interstate 84 (Pennsylvania-Massachusetts)|I-84]] in [[East Hartford, Connecticut|East Hartford, CT]]
| terminus_b = [[#I0090|I-90]] in [[Sturbridge, Massachusetts|Sturbridge, MA]]
| established = 1968
| established_ref =
| circa_established =
| decommissioned = 1984
| decommissioned_ref =
| notes = Served two states: Connecticut, Massachusetts<br />Redesignated as I-84 in 1984 when the I-84 Hartford-Providence corridor was cancelled
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 87
| dab = North Carolina
| length_mi = 12.90
| terminus_a = [[#I0040|I-40]]/[[Interstate 440 (North Carolina)|I-440]]/[[U.S. Route 64|US&nbsp;64]] in [[Raleigh, North Carolina|Raleigh, NC]]
| terminus_b = US&nbsp;64/[[U.S. Route 264|US&nbsp;264]] in [[Wendell, North Carolina|Wendell, NC]]
| established = 2017
| notes = Unfinished in North Carolina; North Carolina only; planned in one more: Virginia<br />Associated route: [[Interstate 587 (North Carolina)|I-587]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 87
| dab = New York
| length_mi = 333.49
| terminus_a = [[Interstate 278|I-278]] in [[Port Morris, New York|Port Morris, NY]]
| terminus_b = [[Quebec Autoroute 15|A-15]] at [[Champlain (village), New York|Champlain, NY]]
| established = 1957
| notes = New York only<br />Associated routes: [[Interstate 287|I-287]], [[Interstate 587 (New York)|I-587]], [[Interstate 787|I-787]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 88
| dab = Illinois
| length_mi = 140.60
| terminus_a = [[#I0080|I-80]]/[[Illinois Route 5|IL&nbsp;5]]/[[Illinois Route 92|IL&nbsp;92]]/[[Chicago–Kansas City Expressway|Route 110 (CKC)]] northeast of [[East Moline, Illinois|East Moline, IL]]
| terminus_b = [[Interstate 290 (Illinois)|I-290]]/[[Chicago–Kansas City Expressway|Route 110 (CKC)]] in [[Hillside, Illinois|Hillsdale, IL]]
| established = 1987
| notes = Illinois only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 88
| dab = New York
| length_mi = 117.75
| terminus_a = [[#I0081|I-81]] in [[Chenango, New York|Chenango, NY]]
| terminus_b = [[#I0090|I-90]]/[[New York State Thruway]] in [[Rotterdam, New York|Rotterdam, NY]]
| established = 1968
| notes = New York only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 89
| length_mi = 191.12
| terminus_a = [[#I0093|I-93]]/[[Everett Turnpike]]/[[New Hampshire Route 3A|NH&nbsp;3A]] in [[Bow, New Hampshire|Bow, NH]]
| terminus_b = [[Quebec Route 133|Route&nbsp;133]] at [[Highgate, Vermont|Highgate, VT]]
| established = 1960
| notes = Serves two states: New Hampshire, Vermont<br />Associated route: [[Interstate 189|I-189]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 90
| length_mi = 3,099.74
| terminus_a = [[Washington State Route 519|SR&nbsp;519]] in [[Seattle, Washington|Seattle, WA]]
| terminus_b = [[Massachusetts Route 1A|Route&nbsp;1A]] in [[Boston, Massachusetts|Boston, MA]]
| established = 1956
| notes = Serves 13 states: [[Interstate 90 in Washington|Washington]], [[Interstate 90 in Idaho|Idaho]], [[Interstate 90 in Montana|Montana]], [[Interstate 90 in Wyoming|Wyoming]], [[Interstate 90 in South Dakota|South Dakota]], [[Interstate 90 in Minnesota|Minnesota]], [[Interstate 90 in Wisconsin|Wisconsin]], [[Interstate 90 in Illinois|Illinois]], [[Interstate 90 in Indiana|Indiana]], [[Interstate 90 in Ohio|Ohio]], [[Interstate 90 in Pennsylvania|Pennsylvania]], [[Interstate 90 in New York|New York]], [[Interstate 90 in Massachusetts|Massachusetts]]<br />Associated routes: [[Interstate 190 (disambiguation)|I-190]], [[Interstate 290 (disambiguation)|I-290]], [[Interstate 390|I-390]], [[Interstate 490 (disambiguation)|I-490]], [[Interstate 590|I-590]], [[Interstate 690|I-690]], [[Interstate 790|I-790]], [[Interstate 890|I-890]], [[Interstate 990|I-990]]<br/>Longest Interstate highway
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 91
| length_mi = 290.37
| terminus_a = [[#I0095|I-95]] in [[New Haven, Connecticut|New Haven, CT]]
| terminus_b = [[Quebec Autoroute 55|A-55]] at [[Derby Line, Vermont|Derby Line, VT]]
| established = 1958
| notes = Serves three states: Connecticut, Massachusetts, Vermont<br />Associated routes: [[Interstate 291 (disambiguation)|I-291]], [[Interstate 391|I-391]], [[Interstate 691|I-691]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 93
| length_mi = 189.95
| terminus_a = [[#I0095|I-95]]/[[U.S. Route 1|US&nbsp;1]]/[[Massachusetts Route 128|Route&nbsp;128]] in [[Canton, Massachusetts|Canton, MA]]
| terminus_b = [[#I0091|I-91]] in [[Waterford, Vermont|Waterford, VT]]
| established = 1957
| notes = Serves three states: [[Interstate 93 in Massachusetts|Massachusetts]], [[Interstate 93 in New Hampshire|New Hampshire]], [[Interstate 93 in Vermont|Vermont]]<br />Associated routes: [[Interstate 293|I-293]], [[Interstate 393|I-393]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 94
| length_mi = 1,555.43
| terminus_a = [[#I0090|I-90]]/[[U.S. Route 87|US&nbsp;87]]/[[U.S. Route 212|US&nbsp;212]] in [[Lockwood, Montana|Lockwood, MT]]
| terminus_b = [[Ontario Highway 402|Highway&nbsp;402]] at [[Port Huron, Michigan|Port Huron, MI]]
| established = 1956
| notes = Serves seven states: [[Interstate 94 in Montana|Montana]], [[Interstate 94 in North Dakota|North Dakota]], [[Interstate 94 in Minnesota|Minnesota]], [[Interstate 94 in Wisconsin|Wisconsin]], [[Interstate 94 in Illinois|Illinois]], [[Interstate 94 in Indiana|Indiana]], [[Interstate 94 in Michigan|Michigan]]<br />Associated routes: [[Interstate 194 (disambiguation)|I-194]], [[Interstate 294|I-294]], [[Interstate 394|I-394]], [[Interstate 494|I-494]], [[Interstate 694|I-694]], [[Interstate 794|I-794]], [[Interstate 894|I-894]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 95
| length_mi = 1,905.96
| terminus_a = [[U.S. Route 1|US&nbsp;1]] in [[Miami, Florida|Miami, FL]]
| terminus_b = [[New Brunswick Route 95|Route&nbsp;95]] at [[Houlton, Maine|Houlton, ME]]
| established = 1957
| notes = Serves [[Woodrow Wilson Bridge|DC]] and 15 states: [[Interstate 95 in Florida|Florida]], [[Interstate 95 in Georgia|Georgia]], [[Interstate 95 in South Carolina|South Carolina]], [[Interstate 95 in North Carolina|North Carolina]], [[Interstate 95 in Virginia|Virginia]], [[Interstate 95 in Maryland|Maryland]], [[Interstate 95 in Delaware|Delaware]], [[Interstate 95 in Pennsylvania|Pennsylvania]], [[Interstate 95 in New Jersey|New Jersey]], [[Interstate 95 in New York|New York]], [[Interstate 95 in Connecticut|Connecticut]], [[Interstate 95 in Rhode Island|Rhode Island]], [[Interstate 95 in Massachusetts|Massachusetts]], [[Interstate 95 in New Hampshire|New Hampshire]], [[Interstate 95 in Maine|Maine]]<br />Associated routes: [[Interstate 195 (disambiguation)|I-195]], [[Interstate 295 (disambiguation)|I-295]], [[Interstate 395 (disambiguation)|I-395]], [[Interstate 495 (disambiguation)|I-495]], [[Interstate 595 (disambiguation)|I-595]], [[Interstate 695 (disambiguation)|I-695]], [[Interstate 795 (disambiguation)|I-795]], [[Interstate 895|I-895]]<br/>Longest primary north-south Interstate highway
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 96
| length_mi = 192.032
| terminus_a = [[U.S. Route 31|US&nbsp;31]] in [[Norton Shores, Michigan|Norton Shores, MI]]
| terminus_b = [[#I0075|I-75]] in [[Detroit, Michigan|Detroit, MI]]
| established = 1959
| notes = Michigan only<br />Associated routes: [[Interstate 196|I-196]], [[Interstate 296|I-296]], [[Interstate 496|I-496]], [[Interstate 696|I-696]]
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 97
| length_mi = 17.62
| terminus_a = [[U.S. Route 50|US&nbsp;50]]/[[U.S. Route 301 in Maryland|US&nbsp;301]] in [[Parole, Maryland|Parole, MD]]
| terminus_b = [[Interstate 695 (Maryland)|I-695]]/[[Interstate 895 (Maryland)|I-895A]] in [[Brooklyn Park, Maryland|Brooklyn Park, MD]]
| established = 1987
| notes = Maryland only
| state =
}}
{{routelist row
| country = USA
| type = I
| route = 99
| length_mi = 161.68
| terminus_a = [[U.S. Route 220|US&nbsp;220]]/[[Special routes of U.S. Route 220|US&nbsp;220 Bus.]] north of [[Bedford, Pennsylvania|Bedford, PA]]<hr>[[Interstate 180 (Pennsylvania)|I-180]]/[[U.S. Route 15|US&nbsp;15]]/[[U.S. Route 220|US&nbsp;220]] in [[Williamsport, Pennsylvania|Williamsport, PA]]
| terminus_b = US&nbsp;220/[[Pennsylvania Route 26|PA&nbsp;26]] northeast of [[Bellefonte, Pennsylvania|Bellefonte, PA]]<hr>[[Interstate 84 (Pennsylvania–Massachusetts)|I-86]]/US&nbsp;15/[[New York State Route 17|NY&nbsp;17]]/[[New York State Route 352|NY&nbsp;352]] at [[Painted Post, New York|Painted Post, NY]]
| established = 1998
| notes = Unfinished in Pennsylvania; serves two states: Pennsylvania, [[U.S. Route 15 in New York|New York]]
| state =
}}
{{routelist bottom|keys=former,future}}
 
==Other regions==
In addition to the 48 contiguous states, Interstate Highways are found in Hawaii, Alaska, and Puerto Rico.  The [[Federal Highway Administration]] funds four routes in [[Alaska]] and three routes in [[Puerto Rico]] under the same program as the rest of the Interstate Highway System. However, these routes are not required to meet the same standards as the mainland routes:
 
{{cquote|Highways on the Interstate System in Alaska and Puerto Rico shall be designed in accordance with such geometric and construction standards as are adequate for current and probable future traffic demands and the needs of the locality of the highway.<ref>{{cite web |url=https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/?redirect |title=FHWA Route Log and Finder List
|access-date=May 24, 2007 |author= Staff |publisher= Federal Highway Administration}}</ref>}}
 
===Hawaii===
{{maplink |type=line |frame=yes |plain=no |frame-width=300 |frame-height=260 |frame-coord={{coord|21.473|-157.9868}} |from=Interstates in Hawaii.map |text=Map of Hawaii's Interstate Highways (excluding H-201)|zoom=9}}
 
The Interstate Highways on the island of [[Oahu|O{{okina}}ahu]], [[Hawaii]] are signed with the standard Interstate Highway shield, with the letter "H-" prefixed before the number. They are fully controlled-access routes built to the same standards as the mainland Interstate Highways.
 
{{routelist top |length_ref=<ref name="table1"/>}}
{{routelist row
|state=HI
|type=I
|route=1
|terminus_a=[[Hawaii Route 93|Route&nbsp;93]] in [[Kapolei, Hawaii|Kapolei]]
|terminus_b=[[Hawaii Route 72|Route&nbsp;72]] in [[Honolulu]]
|established=1960
|length_mi=27.16
|notes=Associated route: [[Interstate H-201|H-201]]
}}
{{routelist row
|state=HI
|type=I
|route=2
|terminus_a=[[Interstate H-1|H-1]] in [[Pearl City, Hawaii|Pearl City]]
|terminus_b=[[Hawaii Route 99|Route&nbsp;99]] in [[Wahiawa, Hawaii|Wahiawa]]
|established=1960
|length_mi=8.33
|notes=none
}}
{{routelist row
|state=HI
|type=I
|route=3
|terminus_a=[[Interstate H-1|H-1]]/[[Interstate H-201|H-201]] in [[Halawa, Hawaii|Halawa]]
|terminus_b=[[Marine Corps Base Hawaii]]
|established=1997
|length_mi=15.32
|notes=none
}}
{{routelist bottom|keys=}}
 
===Alaska===
{{Main|List of Interstate Highways in Alaska}}
{{maplink |type=line |frame=yes |plain=no |frame-width=300 |frame-height=240 |frame-coord={{coord|64|-152}} |frame-align=right |zoom=3 |from=List of Interstate Highways in Alaska.map |text=Map of Alaska's Interstate Highways}}
[[Alaska]]'s Interstate Highways are unsigned as such, although they all have state highway numbers that do not match the Interstate Highway numbers.<ref>{{cite web |url=http://www.alaskaroads.com/Interstate-ends.htm |title=Alaska Roads: Interstate ends photos |access-date=May 24, 2007 |last=Voss |first=Oscar}}</ref>
{{routelist top|length_ref=<ref name="table1"/>}}
{{routelist row
|state=AK
|type=I
|route=1
|sortkey=1
|length_mi=408.23
|terminus_a=[[Anchorage, Alaska|Anchorage]]
|terminus_b=[[Yukon Highway 1|Hwy. 1]] at [[Alcan Border, Alaska|Alcan Border]]
|notes=[[Glenn Highway]], [[Richardson Highway]], [[Tok Cut-Off]], [[Alaska Highway]]<ref name="AADT Central">{{cite report|first=Jennifer W. |last=Witt |year=2010 |title=Annual Traffic Volume Report |edition=2008-2009-2010 |url=http://www.dot.state.ak.us/stwdplng/mapping/trafficmaps/trafficdata_reports_cen/2010_ATVR_FINAL_All_Posted.pdf |publisher=[[Alaska Department of Transportation & Public Facilities]] |access-date=March 15, 2012 |url-status=dead |archive-url=https://web.archive.org/web/20140330090745/http://www.dot.state.ak.us/stwdplng/mapping/trafficmaps/trafficdata_reports_cen/2010_ATVR_FINAL_All_Posted.pdf |archive-date=March 30, 2014 }}</ref><ref name="AADT North">{{cite report |first= Ethan |last= Birkholz |year= 2010 |title= Annual Traffic Volume Report |edition= 2008-2009-2010 |url= http://www.dot.alaska.gov/stwdplng/mapping/trafficmaps/trafficdata_reports_nor/NRVolumeRpt2008-10.pdf |publisher= [[Alaska Department of Transportation & Public Facilities]] |access-date= May 31, 2012 |url-status= dead |archive-url= https://web.archive.org/web/20140417104824/http://www.dot.alaska.gov/stwdplng/mapping/trafficmaps/trafficdata_reports_nor/NRVolumeRpt2008-10.pdf |archive-date= April 17, 2014 |df= mdy-all }}</ref><ref name="Interstate Maps">{{cite web |author=Staff |publisher= Federal Highway Administration |url= http://www.dot.alaska.gov/stwdplng/transdata/routelists/interstate_mapset2006final.pdf |archive-url= https://web.archive.org/web/20140417115322/http://www.dot.alaska.gov/stwdplng/transdata/routelists/interstate_mapset2006final.pdf |url-status= dead |archive-date= April 17, 2014 |title=Dwight D. Eisenhower Interstate Routes Statewide |access-date=May 31, 2012}}</ref><ref name="Interstate List">{{cite web |author= Staff |publisher= Federal Highway Administration |url=http://www.dot.alaska.gov/stwdplng/transdata/routelists/interstate_2008_10.pdf |archive-url=https://web.archive.org/web/20140417105602/http://www.dot.alaska.gov/stwdplng/transdata/routelists/interstate_2008_10.pdf |url-status=dead |archive-date=April 17, 2014 |title=Alaska Department of Transportation and Public Facilities Routes by Description: CDS Route Numbers as of 28 October 2008 |access-date=May 31, 2012}}</ref>
|established=1976
}}
{{routelist row
|state=AK
|type=I
|route=2
|sortkey=2
|length_mi=202.18
|terminus_a=[[Tok, Alaska|Tok]]
|terminus_b=[[Fairbanks, Alaska|Fairbanks]]
|notes=[[Alaska Highway]], [[Richardson Highway]]<ref name="AADT North"/><ref name="Interstate Maps"/><ref name="Interstate List"/>
|established=1976
}}
{{routelist row
|state=AK
|type=I
|route=3
|sortkey=3
|length_mi=148.12
|terminus_a=[[Anchorage, Alaska|Anchorage]]
|terminus_b=[[Soldotna, Alaska|Soldotna]]
|notes=[[Seward Highway]], [[Sterling Highway]]<ref name="AADT Central"/><ref name="Interstate Maps"/><ref name="Interstate List"/>
|established=1976
}}
{{routelist row
|state=AK
|type=I
|route=4
|sortkey=4
|length_mi=323.69
|terminus_a=[[Gateway, Alaska|Gateway]], {{nowrap|near [[Palmer, Alaska|Palmer]]}}
|terminus_b=[[Fairbanks, Alaska|Fairbanks]]
|notes=[[George Parks Highway|Parks Highway]]<ref name="AADT Central"/><ref name="AADT North"/><ref name="Interstate Maps"/><ref name="Interstate List"/>
|established=1976
}}
{{routelist bottom}}
 
===Puerto Rico===
{{Main|List of highways in Puerto Rico#Interstates}}
[[File:Puerto Rico Interstates.svg|300px|thumb|right|Map of the Interstates in Puerto Rico]]
[[Puerto Rico]] signs its Interstate Highways as territorial routes, as the numbers do not match their official Interstate Highway designations. Many of the territory's routes are [[freeway]]-standard [[toll road]]s.<ref>{{cite web |url=http://www.hawaiihighways.com/Puerto-Rico-page2.html |title=Puerto Rico road photos |access-date=May 24, 2007 |last=Voss |first=Oscar}}</ref>
{{routelist top|length_ref=<ref name="table1"/>}}
{{routelist row
|state=PR
|type=I
|route=1
|length_mi=71.08
|terminus_a= [[Puerto Rico Highway 2|PR-2]] in [[Ponce, Puerto Rico|Ponce]]
|terminus_b= PR-2 in [[San Juan, Puerto Rico|San Juan]]
|notes= Follows [[Puerto Rico Highway 52|PR-52]]
|established= 1976
|length_ref=
}}
{{routelist row
|state=PR
|type=I
|route=2
|length_mi=138.13
|terminus_a= [[Puerto Rico Highway 1|PR-1]] in [[Ponce, Puerto Rico|Ponce]]
|terminus_b= [[Puerto Rico Highway 3|PR-3]] in [[San Juan, Puerto Rico|San Juan]]
|notes= Follows [[Puerto Rico Highway 22|PR-22]]
|established= 1976
|length_ref=
}}
{{routelist row
|state=PR
|type=I
|route=3
|length_mi=40.56
|terminus_a= [[Puerto Rico Highway 3|PR-3]] in [[Humacao, Puerto Rico|Humacao]]
|terminus_b= [[Puerto Rico Highway 2|PR-2]] in [[San Juan, Puerto Rico|San Juan]]
|notes= Follows [[Puerto Rico Highway 66|PR-66]]
|established=1976
|length_ref=
}}
{{routelist bottom}}
 
==See also==
* {{Portal-inline|U.S. Roads}}
 
==References==
{{Reflist}}
 
==External links==
*{{osmrelation|9703451}}
* [http://www.alaskaroads.com/Interstate-ends.htm Alaska Roads - Interstate ends photos]
* [http://www.hawaiihighways.com/Puerto-Rico-page2.html Puerto Rico road photos]
* [https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/?redirect The Dwight D. Eisenhower National System of Interstate and Defense Highways Route Log and Finder List]
* [http://www.kurumi.com/roads/3di/index.html 3-digit Interstate Highways]
{{interstates}}
{{Authority control}}
{{DEFAULTSORT:List of primary Interstate Highways}}
[[Category:Interstate Highway System| Primary]]
[[Category:Lists of Interstate Highways| Primary]]

Latest revision as of 02:07, 16 November 2025

Template:Short description Template:Use American English Template:Use mdy dates <templatestyles src="Infobox road/styles.css" />Script error: No such module "Infobox".Template:Template other

There are 71 primary Interstate Highways in the Interstate Highway System, a network of freeways in the United States. These primary highways are assigned one- or two-digit route numbers, whereas their associated auxiliary Interstate Highways receive three-digit route numbers. Typically, even-numbered Interstates run east–west, with lower numbers in the south and higher numbers in the north; odd-numbered Interstates run north–south, with lower numbers in the west and higher numbers in the east. Route numbers divisible by 5 usually represent major coast-to-coast or border-to-border routes (ex. I-10 connects Santa Monica, California to Jacksonville, Florida, extending between the Pacific and Atlantic oceans). Auxiliary highways have an added digit prefixing the number of the parent highway.

Five route numbers are duplicated in the system; the corresponding highways are in different regions, reducing potential confusion. In addition to primary highways in the contiguous United States, there are signed Interstates in Hawaii and unsigned Interstates in Alaska and Puerto Rico. Template:TOClimit

Contiguous United States

There are 71 primary interstate highways in the 48 contiguous United States as well as five former and one future primary interstate highway. This number does not include auxiliary Interstate Highways. Template:Routelist top Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist bottom

Other regions

In addition to the 48 contiguous states, Interstate Highways are found in Hawaii, Alaska, and Puerto Rico. The Federal Highway Administration funds four routes in Alaska and three routes in Puerto Rico under the same program as the rest of the Interstate Highway System. However, these routes are not required to meet the same standards as the mainland routes:

Template:Main other

Hawaii

Template:Maplink

The Interstate Highways on the island of Oʻahu, Hawaii are signed with the standard Interstate Highway shield, with the letter "H-" prefixed before the number. They are fully controlled-access routes built to the same standards as the mainland Interstate Highways.

Template:Routelist top Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist bottom

Alaska

Script error: No such module "Labelled list hatnote". Template:Maplink Alaska's Interstate Highways are unsigned as such, although they all have state highway numbers that do not match the Interstate Highway numbers.[1] Template:Routelist top Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist bottom

Puerto Rico

Script error: No such module "Labelled list hatnote".

File:Puerto Rico Interstates.svg
Map of the Interstates in Puerto Rico

Puerto Rico signs its Interstate Highways as territorial routes, as the numbers do not match their official Interstate Highway designations. Many of the territory's routes are freeway-standard toll roads.[2] Template:Routelist top Template:Routelist row Template:Routelist row Template:Routelist row Template:Routelist bottom

See also

References

Template:Reflist

External links

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ Script error: No such module "citation/CS1".
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