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Oversize and Overweight Vehicles

What are the maximum dimensions for vehicles in the District of Columbia?

Unless otherwise posted the maximum dimensional restrictions for vehicles and combinations are as follows:

References after each item below may be found in subdivisions of section 18-25 of the D.C. Municipal regulations.

Maximum Vehicle Dimensions
Width
∙ 8 feet [18-2501.1]
∙ 8 feet 6 inches for buses having a carrying capacity of more than 15 passengers [18-2501.2]
Height
∙ 13 feet 6 inches for all vehicles [18-2501.5]
Length
∙ 40 feet for all single unit vehicles [18-2502.1]
∙ 60 feet for all buses [18-2502.7]
∙ 55 feet for all semi-trailers and other combinations of vehicles [18-2501.2]*

*Note: Combination vehicles will be subject to federal size limitations on interstate highways.

What are the maximum weight limits for vehicles in the District of Columbia?

Unless otherwise posted the maximum weight limits for vehicles and combinations are as follows:

Maximum Vehicle Weights*
Weight on any one axle 21,000 pounds [18-2505.1]
Weight on any two consecutive axles less than 10 feet apart 34,000 pounds 34,000 pounds [18-2505.5]

*Note: Combination vehicles will be subject to federal size limitations on interstate highways. You can also find more a more detailed vehicle weight chart in DCMR 18-2505

What do I do if my vehicle exceeds the limits listed above?

Oversized/overweight vehicles require a permit to travel within the District of Columbia. The DDOT Online Permitting System, TOPS, allows users to apply for permits to operate oversize and overweight vehicles in the District, including annual tags and single haul permits. Please note that there are certain limitations that will determine the type of permit available to operators based on the size of the vehicle and/or the load.

To obtain a permit for your oversized/overweight vehicle please click here to visit TOPS, the DDOT Online Permitting System. To view a pdf list of frequently asked questions about the permitting process, please click here. You can also reach the Permitting Office at (202) 442-4670 between 8:30am and 4pm, Monday through Friday, on normal business working days.

Weigh station locations

The District Department of Transportation operates two vehicle weigh stations:

  • Half Street SW

  • I-295 Blue Plains SE

What is the legal route for 53 foot trailers in the District of Columbia?

In the District of Columbia, a 53 foot trailer may be operated on the National Network comprised of the following:

  • I-295 from the District of Columbia - Maryland line to the Interchange with I-695 in the vicinity of 11th and L Streets, S.E.;

  • I-695 from the interchange with I-295 in the vicinity of 11th and L Streets, S.E., to the interchange with I-395 in the vicinity of 2nd and E Streets, S.W.;

  • I-395 from the Virginia - D.C. line to the interchange with I-695 in the vicinity of 2nd and E Streets, S.W.;

  • The Anacostia Freeway from the 11th Street Bridge (I-295) to East Capitol Street; and

  • Kenilworth Avenue, N.E. from East Capitol Street to the D.C. - Maryland line.

Map of routes for 53 foot trailers, coming soon.