District of Columbia Truck Weight Limits
The District caps trucks at 79,000 pounds, a thousand under the federal number, and it holds on every street including the Interstate spurs (18 DCMR 2505). Single axle is 21,000, dropping to 20,000 once you pass 73,000 gross; tandem is 34,000, with a 1,000-pound axle tolerance. Cross 79,000 gross or 31,000 on an axle and you need a permit and an escort. Overweight fines add roughly $16 for each 100 pounds over the threshold, on top of the base.
Some figures on this page are flagged medium confidence. The weight limits are solid, but a specific fine or permit ceiling should be confirmed with the state DOT before you rely on it.
How much a truck can weigh in District of Columbia
The District caps trucks at 79,000 pounds, a thousand under the federal number, and it holds on every street including the Interstate spurs (18 DCMR 2505). Single axle is 21,000, dropping to 20,000 once you pass 73,000 gross; tandem is 34,000, with a 1,000-pound axle tolerance. Cross 79,000 gross or 31,000 on an axle and you need a permit and an escort. Overweight fines add roughly $16 for each 100 pounds over the threshold, on top of the base.
Axles, off-Interstate, and permits
- Off the Interstate: 80,000 lb
- Single axle: 21,000 lb; drops to 20,000 lb once gross exceeds 73,000 lb
- Tandem axle: 34,000 lb (1,000-lb axle-load tolerance)
- DC has no Interstate mileage of its own; the 80,000 lb federal limit applies on its freeways. Bridge and street postings are common downtown.
Posted bridge and road limits
The District posts many streets and bridges against trucks with MUTCD weight-limit signs in short tons. A posted limit overrides the 79,000-lb legal max, and DC restricts truck routes tightly downtown. Vehicles over 79,000 lb gross or 31,000 lb on an axle need an oversize/overweight permit and an escort before they move. Crossing a posted-under-capacity structure is its own violation on top of the overweight fine.
What running heavy costs
18 DCMR 2600: up to 5,000 lb over the limit = $250; over 5,000 lb = $100 base plus $16 for each additional 100 lb over 5,000. Exceeding the registered gross weight is a separate $500.
District of Columbia Truck Weight Limit FAQ
What is the truck weight limit in District of Columbia?
How much can a truck weigh with a permit in District of Columbia?
What is the overweight fine in District of Columbia?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: http://dcrules.elaws.us/dcmr/18-2505. See our Terms & Disclaimer.
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