District of Columbia Truck Bans & Hazmat Routes
In DC the parkways are cars-only, and the ban keys on commercial markings, not weight. Rock Creek, the GW Memorial, Baltimore-Washington, Suitland, and Clara Barton parkways are all off-limits to commercial vehicles, and US Park Police ticket the box trucks a car GPS sends onto them. On the street, follow DDOT's District Truck Map and stay on the network. The Capitol-zone hazmat ban (Section 8-1423) was found federally preempted, so route placarded loads around town on I-495.
Where District of Columbia keeps trucks out
In DC the parkways are cars-only, and the ban keys on commercial markings, not weight. Rock Creek, the GW Memorial, Baltimore-Washington, Suitland, and Clara Barton parkways are all off-limits to commercial vehicles, and US Park Police ticket the box trucks a car GPS sends onto them. On the street, follow DDOT's District Truck Map and stay on the network. The Capitol-zone hazmat ban (Section 8-1423) was found federally preempted, so route placarded loads around town on I-495.
Key restrictions
- All NPS parkways in DC (Rock Creek, GW Memorial, B-W, Suitland, Clara Barton): no commercial vehicles, permit only.
- No trucks on the Theodore Roosevelt Bridge; trucks prohibited on I-66 east of I-495.
- Follow the DDOT District Truck Map; 'Through Trucks Prohibited' streets are ticket-enforced.
- Capitol-zone hazmat ban (Section 8-1423) is federally preempted and unenforced; route placarded loads around DC on I-495.
- Parkway / road ban: Every National Park Service road in the District bans commercial vehicles: Rock Creek and Potomac Parkway, the George Washington Memorial Parkway, the Baltimore-Washington and Suitland parkways, and the Clara Barton Parkway. Any commercial marking counts, so a landscape or home-improvement truck is barred even if it fits under the bridges. US Park Police enforce and ticket.
- Hazmat: No enforceable state tunnel or zone hazmat ban; placarded loads route around the District on the Capital Beltway (I-495) under 49 CFR 397. The District's own law banning ultrahazardous shipments within 2.2 miles of the Capitol (D.C. Code Section 8-1423, the Capitol Exclusion Zone) was found federally preempted (PHMSA determination PD-31, for failing the FMCSA hazmat-routing standards) and is not enforced against interstate carriers.
- Through-truck routes: DDOT publishes the District Truck Map with designated truck and bus routes, 'Through Trucks Prohibited' streets, posted weight and clearance limits, and loading zones. A through truck must stay on the network; leave it only for the shortest legal path to a local stop.
- Fine: A commercial vehicle on an NPS parkway draws a US Park Police federal citation set by the US District Court, and you pay for any low arch you clip. A DDOT through-truck or posted-route violation is a District ticket in the hundreds.
District of Columbia Truck Route FAQ
Are there roads that ban trucks in District of Columbia?
What are the hazmat restrictions in District of Columbia?
What is the fine for a truck on a banned road 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: https://freight.ddot.dc.gov/pages/commercial-vehicle-routes-restrictions. See our Terms & Disclaimer.
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