The Virginia Department of Transportation (VDOT) is the agency of the state government responsible for transportation in the state of Virginia in the United States. VDOT is headquartered at the Virginia Department of Highways Building in downtown Richmond. VDOT is responsible for building, maintaining, and operating the roads, bridges, and tunnels in the commonwealth. It is overseen by the Commonwealth Transportation Board, which has the power to fund airports, seaports, rail, and public transportation. VDOT's revised annual budget for fiscal year 2019 is $5.4 billion. VDOT has a workforce of about 7,500 full-time employees. Responsibilities Virginia has the nation's third largest system of state-maintained highways, after North Carolina and Texas. The Virginia highway system totals approximately 58,000 miles of interstate, primary, frontage, and secondary roads. The system includes about 20,000 bridges and structures. In addition, independent cities and towns, as well as the counties of Henrico and Arlington, maintain approximately 12,000 miles of local streets, and receive funds from the state for that purpose. VDOT operates and maintains: Roads: VDOT's largest responsibility is the maintenance of roads. Filling potholes, storm drain cleaning, water drainage, guard rail replacement, bridge work, tree removal, and trash removal, as well as the maintenance of signs and traffic lights. More than 21,000 bridges and structures Snow removal: VDOT is responsible for removing snow along the major roads of Virginia. Forty-one safety rest areas and ten welcome centers along major highways More than 100 commuter parking lots Four underwater crossings in the Hampton Roads area: The mid-town Elizabeth River tunnel The downtown Elizabeth River tunnel The Hampton Roads Bridge-Tunnel on Interstate 64 The Monitor-Merrimac Memorial Bridge-Tunnel on Interstate 664 Two mountain tunnels on Interstate 77 in southwest Virginia: East River Mountain Tunnel Big Walker Mountain Tunnel Two toll roads: Fairfax County's Dulles Toll Road (operated and maintained by MWAA) The Powhite Parkway Extension near Richmond One toll bridge: The George P. Coleman Memorial Bridge Three ferry services: Jamestown Ferry Sunny Bank Merry Point Budget Highway maintenance and operations represent 41% of the total budget, followed by 32% for highway systems construction. Smaller portions of the budget are directed to address the needs and requirements of debt service, support to other agencies, administration, and earmarks and special financing. Sources (in millions) Expenditures (in millions) Districts Virginia is divided into nine districts: Bristol District Counties: Bland, Buchanan, Dickenson, Grayson, Lee, Russell, Scott, Smyth, Tazewell, Washington, Wise and Wythe