Maryland Department of Transportation

The Maryland Department of Transportation (MDOT) is an organization comprising five business units and one Authority:^[2]

• 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

Maryland Department of Transportation

Agency overview
Formed	July 1, 1971; 54 years ago (1971-07-01)
Jurisdiction	State of Maryland
Headquarters	7201 Corporate Center Drive Hanover, Maryland, U.S.
Employees	11,000 (FY 2021)[1][failed verification]
Annual budget	$5.5 billion annual budget (FY 2021)[1][failed verification]
Agency executives	Samantha Biddle, Secretary of Transportation Vacant, Deputy Secretary
Parent agency	State of Maryland
Website	mdot.maryland.gov

Secretaries of Transportation

• 2025–present, Samantha Biddle (Acting Secretary)^[3]
• 2023–2025, Paul Wiedefeld^[4][5]
• 2022–2023, James F. Ports Jr.^[6][7]
• 2020–2022, Gregory I. Slater^[8][9]
• 2015–2020, Pete K. Rahn^[10]
• 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^[10]