The Virginia Department of Transportation (VDOT) is responsible for maintenance (including snow/ice removal) and traffic signs on the following roads, while Arlington is responsible for traffic signals:
- Interstate 66: Custis Memorial Parkway
- Interstate 395: Henry G. Shirley Memorial Highway
- State Route 123: Chain Bridge Road
- State Route 124: Spout Run Parkway (Langston Boulevard to Lorcom Lane)
- State Route 233: Airport Viaduct
- State Route 237: Washington Boulevard (North Glebe Road to Langston Boulevard)
- State Route 309: Old Dominion Drive
- U.S. Route 1: Richmond Highway
- U.S. Route 29: Langston Boulevard
- U.S. Route 50: Arlington Boulevard
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