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Maryland Department of Transportation

The Maryland Department of Transportation (MDOT) is an organization comprising five business units and one Authority:

Column 1
July 1, 1971 (1971-07-01)
State of Maryland
7201 Corporate Center Drive Hanover, Maryland, U.S.
11,000 (FY 2021)
$5.5 billion annual budget (FY 2021)
.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}Kathryn B. “Katie” Thomson, Secretary of TransportationVacant, Deputy Secretary
State of Maryland
mdot.maryland.gov

The Maryland Department of Transportation (MDOT) is an organization comprising five business units and one Authority:

  • Maryland Transportation Authority (Transportation Secretary serves as chairman of the Maryland Transportation Authority)

    • Maryland Transportation Authority Police

  • Maryland Transit Administration

    • Maryland Transit Administration Police

  • Maryland Port Administration

  • State Highway Administration

  • Maryland Motor Vehicle Administration

  • Maryland Aviation Administration

  • 2025–present, Kathryn B. "Katie" Thomson

  • 2025, Samantha Biddle (Acting Secretary)

  • 2023–2025, Paul Wiedefeld

  • 2022–2023, James F. Ports Jr.

  • 2020–2022, Gregory I. Slater

  • 2015–2020, Pete K. Rahn

  • 2013–2015, James T. Smith Jr.

  • 2012–2013, Darrell Mobley (Acting Secretary)

  • 2009–2012, Beverley K. Swaim-Staley

  • 2007–2009, John D. Porcari

  • 2003–2007, Robert L. Flanagan

  • 1999–2003, John D. Porcari

  • 1995–1998, David L. Winstead

  • 1991–1994, O. James Lighthizer

  • 1987–1991, Richard H. Trainor

  • 1984–1987, William K. Hellmann

  • 1981–1984, Lowell K. Bridwell

  • 1979–1981, James J. O'Donnell

  • 1977–1979, Herman K. Intemann

  • 1971–1977, Harry R. Hughes

  • Official website

  • Maryland MVA

  • Biographies of former Secretaries

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