View source for Michigan Department of Transportation

{{Short description|Government agency in Michigan}}
{{Use mdy dates|date=November 2023}}
{{Use American English|date=November 2023}}
{{Infobox government agency
| agency_name     = Michigan Department of Transportation
| type            = department
| seal            = MichiganDOT.svg
| seal_caption    = MDOT logo
| formed          = {{start date and age|1905|07|01}}
| preceding1      = Michigan Department of State Highways
| jurisdiction    = [[State of Michigan]]
| headquarters    = 425 [[Capitol Loop|West Ottawa Street]]<br/>[[Lansing, Michigan]] 48933
| coordinates     = {{Coord|42|44|04|N|84|33|30|W|type:landmark_region:US-MI|display=inline,title}}
| employees       = 
| budget          = $4.7 Billion <ref>{{cite web |author=Michigan Department of Management and Budget |author-link= Michigan Department of Management and Budget |url=https://www.michigan.gov/documents/budget/FY19_Exec_Budget_613184_7.pdf |title=FY19 Executive Budget |publisher=State of Michigan |date=February 7, 2018 |access-date= November 26, 2018}}</ref><ref name=budget group=lower-alpha>For Fiscal Year 2019.</ref>
| chief1_name     = Brad Wieferich
| chief1_position = Director
| chief2_name     = Michael Hayes
| chief2_position = Transportation Commission Vice-Chair
| keydocument1    = [[Constitution of Michigan]] [http://legislature.mi.gov/doc.aspx?mcl-Article-V-28 Article V § 28]
| website         = {{URL|www.michigan.gov/mdot}}
}}

The '''Michigan Department of Transportation''' ('''MDOT''') is a constitutional [[government]] principal department of the US state of [[Michigan]]. The primary purpose of MDOT is to maintain the [[Michigan Highway System|Michigan State Trunkline Highway System]] which includes all Interstate, US and state highways in Michigan with the exception of the [[Mackinac Bridge]].{{#tag:ref|The [[Mackinac Bridge Authority]] (MBA) is an independent state agency responsible for the Mackinac Bridge and thus maintains that section of the overall highway system. The MBA works with MDOT but does not report to it. The executive secretary of the MBA is appointed by MDOT with MBA approval.<ref name=MBAPR>{{cite press release |author=Mackinac Bridge Authority |author-link= Mackinac Bridge Authority |url=http://www.mackinacbridge.org/index.php?action=archived&artid=131 |title=Granholm Approves MDOT, Bridge Authority Agreement Securing Bridge's Future |publisher=Mackinac Bridge Authority |date=September 20, 2005 |access-date= November 29, 2010}}</ref>|name=MBA|group=lower-alpha}} Other responsibilities that fall under MDOT's mandate include airports, shipping and rail in Michigan.

The predecessor to today's MDOT was the '''Michigan State Highway Department''' ('''MSHD''') that was formed on July 1, 1905 after a constitutional amendment was approved that year. The first activities of the department were to distribute rewards payments to local units of government for road construction and maintenance. In 1913, the state legislature authorized the creation of the state trunkline highway system, and the MSHD paid double rewards for those roads. These trunklines were signed in 1919, making Michigan the second state to post numbers on its highways. The department continued to improve roadways under its control through the [[Great Depression]] and into [[World War II]]. During the war, the state built its first [[freeway]]s. These freeways became the start of [[List of Interstate Highways in Michigan|Michigan's section of the Interstate Highway System]]. Since the mid-1960s, the department was reorganized. It was renamed the '''Michigan Department of State Highways''' for a time. Further changes culminated in adding all modes of transportation to the department's portfolio. In August 1973, the department was once again renamed to the '''Michigan Department of State Highways and Transportation''' by executive order. The name was later simplified and shortened to that of today.

==History==
===Early history===

[[File:Michigan State Highway Department Historical Marker.jpg|right|thumb|Michigan Historical Marker for the State Highway Department]]

The first State Highway Department was created on July 1, 1905.<ref name="MMM3">{{cite book |last1=Kulsea |first1=Bill |title=Making Michigan Move: A History of Michigan Highways and the Michigan Department of Transportation |last2=Shawver |first2=Tom |publisher=Michigan Department of Transportation |year=1980 |location=Lansing |page=3 |oclc=8169232 |name-list-style=amp}}</ref> The department was born out of the [[Good Roads Movement]] at the turn of the century. Bicycle enthusiasts as a part of the [[League of American Wheelmen]] pushed for better roads and streets. They also wanted to ensure that bicyclists could use these streets and roads free from interference from horsedrawn vehicles. This movement persuaded the [[Michigan State Legislature]] to form a State Highway Commission in 1892. Another law in 1893 allowed voters in each county to establish county road commissions.<ref name="MMM1">{{harvp|Kulsea|Shawver|1980|p=1|ps=.}}</ref> The attention of Michigan residents was turned to the good-roads movement by [[Horatio Earle|Horatio S. Earle]], the first state highway commission. In 1900 he organized the first International Road Congress in [[Port Huron, Michigan|Port Huron]] and even put together a tour of a {{cvt|1|mi|km|sigfig=2|adj=on}} [[macadam]] road. He even ran for the [[Michigan State Senate|state senate]] in 1900 at the urging of the Detroit Wheelmen bicycle club.<ref name="MMM2">{{harvp|Kulsea|Shawver|1980|p=2|ps=.}}</ref> 

The legislature set up a state reward system for highways and created the State Highway Department with an office of Highway Commissioner. Earle was appointed by Governor [[Aaron Bliss]]. This appointment and department were voided when the [[Michigan Attorney General|attorney general]] ruled the law unconstitutional. A constitutional amendment was passed in 1905 to reverse this decision. The department was formed, and Earle was appointed commissioner by Governor [[Fred M. Warner]] on July 1, 1905.<ref name="MMM3" />

At first the department administered rewards to the counties and townships for building roads to state minimum specifications. In 1905 there were {{cvt|68000|mi|km|sigfig=2}} of roads in Michigan. Of these roads, only {{cvt|7700|mi|km|sigfig=2}} were improved with gravel and {{cvt|245|mi|km|sigfig=3}} were macadam. The state's "statute labor system" was abolished in 1907. Under that system, a farmer and a team of horses could work on road improvements in place of paying road taxes. Instead a property tax system was instituted with the funding only for permanent improvements, not maintenance. The nation's first mile of [[concrete]] roadway was laid along [[Woodward Avenue]] between Six Mile and Seven Mile roads in [[Detroit]]. This section of street was <!--{{cvt|17.66|ft|m}}--> 17 feet 8 inches (5.38 m) wide. Work began by the [[Wayne County, Michigan|Wayne County]] Road Commission on April 2, 1909 and finished on July 4, 1909, at a cost of $13,354 (equivalent to ${{formatnum:{{Inflation|US-GDP|13354|1909|r=0}}}} in {{inflation-year|US-GDP}}{{Inflation-fn|US-GDP|name-list-style=amp}}).<ref name="MMM5">{{harvp|Kulsea|Shawver|1980|p=5|ps=.}}</ref>

[[File:Thefirstruralhighwaycenterline.png|thumb|left| Dead Man's Curve along the Marquette–Negaunee Road shown in 1917 with its hand-painted centerline, the first in the nation]]
In 1913 voters elected Frank Rogers to the post of highway commissioner. This election was the first after the legislature made it an elective post. Automobile registrations surged to 20 times the level at the department's formation, to 60,438, and there were {{cvt|1754|mi|km|0}} of roads built under the rewards system. Passage of the "State Trunkline Act" provided for {{cvt|3000|mi|km|0}} of roadways with double rewards payments.<ref name="MMM7">{{harvp|Kulsea|Shawver|1980|p=7|ps=.}}</ref> Further legislation during the Rogers administration allowed for special assessment taxing districts for road improvements, taxation of automobiles based on weight and horsepower and tree-planting along highway roadsides. Another law allowed the commissioner to name all unnamed state roads. It also allowed for the posting of signage with the names and distances to towns.<ref name="MMM9">{{harvp|Kulsea|Shawver|1980|p=9|ps=.}}</ref> 

The centerline was first invented in 1911 in [[Wayne County, Michigan|Wayne County]] by Edward N. Hines, and saw its first implementation on a state highway in 1917 along the Marquette-Negaunee Road, then M-15 and now [[County Road 492 (Marquette County, Michigan)|County Road 492]] in Marquette County. That same year, the first stop sign was put in place and the country's first "crow's nest" traffic signal tower was installed in Detroit. This traffic light using red-yellow-green was developed by William Potts, a Detroit police officer.<ref name="MMM10">{{harvp|Kulsea|Shawver|1980|p=10|ps=.}}</ref> Michigan is also home to the first [[snowplow]].<ref>{{cite web |author=Michigan Department of Transportation |date=n.d. |url=http://www.michigan.gov/mdot/0,1607,7-151-9620_11154-105941--,00.html |title=Transportation Timeline |publisher=Michigan Department of Transportation |access-date= April 18, 2008}}</ref> This winter maintenance started during [[World War I]] to keep {{cvt|590|mi|km|0}} of strategic highways clear.<ref name="MMM10" /> In 1919 Michigan first signed the trunklines, the second state after [[Wisconsin]] to do so.<ref name="MSHD19">{{cite MDOT map |date=1919-07-01 |at=Upper Peninsula and Lower Peninsula sheets}}</ref>

The first ferry service was started on July 1, 1923, linking Michigan's [[Upper Peninsula of Michigan|Upper]] and [[Lower Peninsula of Michigan|Lower]] peninsulas. The first gasoline tax was enacted in 1923 at the rate of $0.02/gal (equivalent to ${{formatprice|{{Inflation|US|.02|1923|{{inflation-year|US-GDP}}|r=2}}}}/gal in {{inflation-year|US-GDP}}{{Inflation-fn|US}}<!--the coding makes sure that this inflates to the same year as the other adjustment-->), but vetoed by Governor [[Alex Groesbeck]].<ref name="MMM11">{{harvp|Kulsea|Shawver|1980|p=11|ps=.}}</ref> It was later enacted effective in 1926. The highway commissioner was also given complete control over the planning and maintenance of the state trunklines. Construction switched to concrete or [[Asphalt concrete|asphalt]] only instead of gravel and macadam with an increase in the gas tax in 1927. Highway construction in the 1920s earned Michigan national attention. The first trunklline completed in concrete was [[M-16 (Michigan highway)|M-16]] (later part of [[U.S. Route 16 in Michigan|US 16]]). The road was built to a standard of {{cvt|20|ft|m|1}} and between {{cvt|7|-|9|in|cm|1}} thick. The current standard at the time was {{cvt|16|ft|m|1}} wide and {{cvt|6|in|cm|1}} thick.<ref name="MMM12">{{harvp|Kulsea|Shawver|1980|p=12|ps=.}}</ref> The 1920s were also busy for Michigan highways as Michigan developed the yellow-line center line to indicate no-passing zones for sight-restricted hills and curves. Roadside picnic tables, soil testing and aerial surveying of highways also debuted at this time. As MDOT historians put it, "the age of mud was over; the age of concrete was moving in.<ref name="MMM13">{{harvp|Kulsea|Shawver|1980|p=13|ps=.}}</ref>

===Later history===
During the [[Great Depression]], highway construction slowed down with decreased gas tax and property tax revenues. License plate fees were sent to the counties for road funding starting in 1932 and road crews made of "reliefers". The federal aid money was split between the highway department and the welfare department. The county welfare agencies supplied workers on road construction projects across the state.<ref name="MMM15">{{harvp|Kulsea|Shawver|1980|p=15|ps=.}}</ref> Roadside parks and travel information centers debuted in the 1930s as well.<ref name="MMM17">{{harvp|Kulsea|Shawver|1980|p=17|ps=.}}</ref> During [[World War II]] the department built the [[Ecorse Road|Willow Run Expressway]] and the [[Interstate 94 in Michigan|Detroit Industrial Expressway]] in 11 months so workers could get to the [[Ford Motor Company]]'s bomber plant at [[Willow Run]].<ref name="MMM18">{{harvp|Kulsea|Shawver|1980|p=18|ps=.}}</ref> When the [[Interstate Highway System]] was created in the late 1950s, Michigan modified existing freeway plans to fit the Interstate standards. In the 1960s nearly {{cvt|1000|mi|km|sigfig=1}} of freeways were built at an average pace of one new mile every three to four days. Michigan was also the first state to complete a border to border Interstate, [[Interstate 94 in Michigan|I-94]] from [[New Buffalo, Michigan|New Buffalo]] to Detroit running {{cvt|205|mi|km|0}}.<ref name="MMM20">{{harvp|Kulsea|Shawver|1980|p=20|ps=.}}</ref> The 1950s and 60s also brought the completion of several major bridges in Michigan, the [[Mackinac Bridge]] in 1957, the [[Portage Lake Lift Bridge]] in 1959 and the [[Sault Ste. Marie International Bridge|International Bridge]] in 1962. The biggest bridge designed by the department spanned the [[River Rouge (Michigan)|River Rouge]] carrying the [[Interstate 75 in Michigan|Fisher Freeway (I-75)]]. This bridge was {{cvt|8367|ft|m|0}} long and {{cvt|115|ft|m|0}} high.<ref name="MMM22-23">{{harvp|Kulsea|Shawver|1980|pp=22-23|ps=.}}</ref>

[[File:MDOT logo 1978.png|MDOT logo 1978|thumb|right]] The adoption of the 1963 Constitution reorganized the department. No longer would the highway commissioner be elected. Instead, a six-member commission appointed by the governor and headed day to day by a department director initial appointed by the commission. The new commission would also have jurisdiction over "such other public works of the state as provided by law.<ref name="MMM24">{{harvp|Kulsea|Shawver|1980|p=24|ps=.}}</ref> At the time, the name was rearranged to the Michigan Department of State Highways. The legislative authorization led to 1970s reorganization of the department. An executive order by Governor [[William G. Milliken]] gave the department authority over all transportation programs in Michigan. The department was renamed on August 23, 1973, to the Michigan Department of State Highways and Transportation giving it responsibility for aviation, railroads, buses, ships, ports and non-motorized pathways and trails.<ref name="MMM27">{{harvp|Kulsea|Shawver|1980|p=27|ps=.}}</ref> In 1976, the department acquired the [[Ann Arbor Railroad (1895–1976)|Ann Arbor Railroad]]. The acquisition included right-of-way from [[Ashley, Michigan|Ashley]] to [[Cadillac, Michigan|Cadillac]] and from [[Ann Arbor, Michigan|Ann Arbor]] to [[Toledo, Ohio]]. At the time, the department gained the rolling stock of the railroad in the first such purchase by the department.<ref name=":0">{{cite book |author = Michigan Department of Transportation |year = 2014 |title = Michigan's Railroad History 1825–2014 |url = https://www.michigan.gov/-/media/Project/Websites/MDOT/Travel/Mobility/Rail/Michigan-Railroad-History.pdf?rev=0e687838f8a540ae823113f2648e9015 |access-date = April 29, 2024 |publisher = Michigan Department of Transportation |page = 24 }}</ref> The name of the department was later shortened to the current form in 1978.<ref name="MMM30-1">{{harvp|Kulsea|Shawver|1980|pp=30–31|ps=.}}</ref>

In November 1978, Michigan voters approved Proposal M, which, in addition to allocating gas tax revenues, replaced the Michigan State Highway Commission with the Michigan State Transportation Commission.<ref name="misos1208">{{Cite web |author=Michigan Secretary of State |author-link= Michigan Secretary of State |title=Initiatives and Referendums under the Constitution of the State of Michigan of 1963 |publisher=Michigan Secretary of State |date=December 5, 2008 |access-date= March 23, 2016 |url=http://www.michigan.gov/documents/sos/Const_Amend_189834_7.pdf}}</ref> By 1983, the department director became appointed by the state governor.

==Leadership==

===State Highway Commissioners===
*[[Horatio Earle|Horatio S. Earle]], 1905–1909
*Townsend A. Ely, 1909–1913
*Frank F. Rogers, 1913–1929
*[[Grover C. Dillman]], 1929–1933
*[[Murray Van Wagoner]], 1933–1940
*Donald Kennedy, 1940–1942
*Lloyd B. Reid, 1942–1943
*Charles M. Ziegler, 1943–1957
*[[John C. Mackie]], 1957–1965

===Department Directors===
*Howard E. Hill, 1965–1967
*Henrik E. Stafseth, 1967–1972
*John P. Woodford, 1972–1982
*James P. Pitz, 1982–1991
*Patrick M. Nowak, 1991–1996
*Robert Welke, 1996–1997
*James R. DeSana, 1997–2001
*Gregory J. Rosine, 2001–2002
*Gloria J. Jeff, 2003–2006
*Kirk T. Steudle, 2006–2018
*Mark Van Port Fleet, 2018
*Paul C. Ajegba, 2019–2022
*Brad Wieferich, 2023–present

===Transportation Commission===
The Michigan State Transportation Commission establishes policy for the Michigan Department of Transportation as they relate to transportation programs, facilities, and developments.<ref name="mdot-aboutstc">{{Cite web |author=Michigan Department of Transportation |date=n.d. |title=About the State Transportation Commission |publisher=Michigan Department of Transportation |access-date= March 23, 2016 |url=http://www.michigan.gov/mdot/0,4616,7-151-9623_31969_31970-29364--,00.html}}</ref> The Michigan State Transportation Commission is composed of six members, serving three-year terms, appointed by the [[Governor of Michigan]] with the advice and consent of the [[Michigan Senate]].<ref name="mdot-stc">{{Cite web |author=Michigan Department of Transportation |date=n.d. |title=Michigan State Transportation Commission |publisher=Michigan Department of Transportation |access-date= April 27, 2023 |url=https://www.michigan.gov/mdot/about/commissions-councils-committees/transportation-commission}}</ref><ref name="mdot-aboutstc" />

==== Membership ====
The [[Constitution of Michigan]] requires that no more than three members be from the same political party.
{| class=wikitable
|-
!scope=col | Name
!scope=col | Hometown
!scope=col | Start
!scope=col | End
|-
|Michael Hayes<sup>†</sup> || [[Midland, Michigan|Midland]] || March 5, 2021 || December 21, 2023
|-
|Rita Brown || [[Birmingham, Michigan|Birmingham]] || April 2023 || December 21, 2025
|-
|Gregory C. Johnson ||[[Wixom, Michigan|Wixom]]||August 7, 2020 || December 21, 2024
|-
|Heath E. Salisbury || [[Gaines, Michigan|Gaines]] || April 8, 2022 || December 21, 2024
|-
|Richard W. Turner || [[Monroe, Michigan|Monroe]] || March 5, 2021 || December 21, 2023
|-
|Rhonda Welburn || [[Detroit]] || April 2023 || December 21, 2025
|-
| colspan="4" align="center" |<sup>†</sup> Vice-Chair
|}

===Michigan Aeronautics Commission===
The Michigan Aeronautics Commission is charged with creating rules regarding airports, related facilities and pilot training. It is composed of five gubernatorial appointees and 4 department head representatives.<ref name="CG">{{cite web |author=Michigan Department of Transportation |url=http://www.michigan.gov/documents/mdot/MDOT_Citizens_Guide_213623_7.pdf |title=A Citizen's Guide to MDOT |access-date= August 22, 2008 |year=2007 |publisher=Michigan Department of Transportation}}</ref>
{| class=wikitable
|-
!scope=col | Name
!scope=col | Hometown
!scope=col | Start
!scope=col | End

|-
||Russell Kavalhuna<sup>†</sup> || [[Dearborn, Michigan|Dearborn]] || May 26, 2021 || May 27, 2025
|-
| Kelly Burris<sup>‡</sup> || [[Pleasant Ridge, Michigan|Pleasant Ridge]] || July 14, 2019 || May 27, 2023
|-	
| Benjamin R. Carter || [[Farmington Hills, Michigan|Farmington Hills]] || May 26, 2021 || May 27, 2024
|-
| Rick J. Fiddler || [[Ada, Michigan|Ada]] || May 28, 2021 || May 27, 2024
|-
| Brian R. Smith || [[Grand Ledge, Michigan|Grand Ledge]] || 2019 || May 27, 2023
|-
| F/LT. Brian Bahlau
|colspan=3 |Representative for the [[Michigan State Police]]
|-
| Brig. Gen. Bryan J. Teff
|colspan=3 | Representative for the [[Michigan Department of Military and Veterans Affairs]]
|-
| Kevin Jacobs
|colspan=3 | Representative for the [[Michigan Department of Natural Resources]]
|-
| Laura J. Mester
|colspan=3 |Representative of the MDOT Director
|-
| Mike Trout
|colspan=3 | Ex-officio director of the Michigan Aeronautics Commission as the Director of the Bureau of Aeronautics and Freight Services of MDOT
|-
|colspan=4 align=center |<sup>†</sup> Chair, <sup>‡</sup> Vice-Chair <br/>Information from the Bureau of Aeronautics<ref>{{cite web |url=https://www.michigan.gov/mdot/about/commissions-councils-committees/michigan-aeronautics-commission |title=Michigan Aeronautics Commission |access-date=April 27, 2023 |author=Bureau of Aeronautics |publisher=Michigan Department of Transportation}}</ref>
|}

==Department organization==
[[File:Michigan DOT Regions.svg|thumb|right|300px|{{center|'''MDOT Regions'''<br/>{{legend0|#00ffff|Bay|outline=silver}} {{legend0|#ff00ff|Grand}} {{legend0|#00ff00|Metro|outline=silver}} {{legend0|yellow|North}}<br/>{{legend0|orange|Southwest}} {{legend0|#0000ff|Superior}} {{legend0|red|University}}}}]]

MDOT is organized into seven regions statewide and a series of divisions and bureaus that report through two chief officers to the department director. The chief administrative officer oversees the sections of the department related to aviation and aeronautics, finances, transportation planning and human resources. The chief operations officers supervises the seven regional offices, and the divisions devoted to highway research, design and construction. 

The offices devoted to communications, passenger transportation and business and economic affairs report to director of the department.<ref name="MDOTOrg">{{cite web |author=Michigan Department of Transportation |title=MDOT Organizational Chart |url=http://www.michigan.gov/documents/orgchart011603_55427_7.pdf |publisher=Michigan Department of Transportation |access-date= November 29, 2010 |date=August 2010}}</ref> The [[Mackinac Bridge Authority]] coordinates its activities to maintain the [[Mackinac Bridge]] as an independent agency through the department director.<ref name="MBAPR" /> The International Bridge Administration (IBA) is the arm of the department responsible to the Sault Ste. Marie Bridge Authority. That authority maintains the [[Sault Ste. Marie International Bridge|International Bridge]].<ref name="iba">{{cite web |url=http://www.michigan.gov/mdot/0,1607,7-151-9618_48384-22039--,00.html |title=Welcome to the International Bridge |author=International Bridge Administration |publisher=Michigan Department of Transportation |date=September 24, 2009 |access-date= November 29, 2010}}</ref> The IBA reports to the chief administrative officer.<ref name="MDOTOrg" />

===Bureau of Aeronautics and Freight Services===
The Bureau of Aeronautics and Freight Services carries out the enforcement of the [[Michigan State Transportation Commission|Commission's]] rules. It has three divisions: Airports Division, Aviation Services, and Freight Services. The bureau, along with the Passenger Transportation Bureau, was formed out of the Multi-Modal Transportation Services Bureau in 2006.<ref name="ra">{{cite web |author=Michigan Aeronautics Commission |url=http://www.michigan.gov/aero/0,1607,7-145-6771_6903_13755-60024--,00.html |title=Rob Abent |access-date= August 22, 2008 |publisher=Michigan Aeronautics Commission |date=October 24, 2006}}</ref>
The Airports Division runs development programs for airports which includes planning, design safety evaluation and construction. Additionally, this division licenses airports, flight schools, aircraft, and aircraft dealers and inspects airports. Seminars for pilots are run to keep license pilots up to date on current procedures.<ref name="CG"/> Mike Trout oversees the Aeronautics.<ref name="ra"/> The Aviation Services Division assists airports in bring in and retaining airline services. Through the Airport Preservation Program, this division aids at risk airports to find ways to stay open.<ref name="CG"/>

===Railroad subsidies===
The department provides [[subsidies]] to [[Amtrak]] [[Michigan Services]] operations in the state for the ''[[Blue Water (train)|Blue Water]]'', ''[[Wolverine (train)|Wolverine]]'' and the ''[[Pere Marquette (Amtrak train)|Pere Marquette]]'' lines.<ref name = "amtrak_michserv">{{cite web |url=http://www.amtrak.com/midwest-train-routes |title=Routes: Midwest |author=Michigan Services |publisher=[[Amtrak]] |date=n.d. |access-date=November 23, 2013}}</ref><ref name = "MICHIGAN05">{{cite web |author=Amtrak |date=n.d. |url=http://www.amtrak.com/pdf/factsheets/MICHIGAN05.pdf |title=Amtrak Fact Sheet, Fiscal Year 2005 |publisher=Amtrak |access-date=October 30, 2006}}</ref>

==See also==
{{Portal|Michigan|Michigan Highways}}
*[[Michigan left]]

==Notes==
{{Reflist|group=lower-alpha}}

==References==
{{Reflist}}

==External links==
{{Commons category}}
*{{official website|}}

{{Michigan state agencies}}
{{U.S. State Departments of Transportation}}
{{Authority control}}

[[Category:Transportation in Michigan]]
[[Category:State agencies of Michigan|Transportation]]
[[Category:State departments of transportation of the United States]]
[[Category:1905 establishments in Michigan]]