Alabama Truck Speed Limit
No split. Trucks run the same limit as cars: 70 on interstates, 65 on other four-lane highways (Ala. Code 32-5A-171). The exception is hazmat. Any vehicle hauling explosives, flammable liquids, or hazardous waste is capped at 55 statewide, day or night. Two-lane roads are generally 55.
How fast a truck can run in Alabama
No split. Trucks run the same limit as cars: 70 on interstates, 65 on other four-lane highways (Ala. Code 32-5A-171). The exception is hazmat. Any vehicle hauling explosives, flammable liquids, or hazardous waste is capped at 55 statewide, day or night. Two-lane roads are generally 55.
Truck-specific rules and quirks
- Any vehicle carrying explosives, flammable liquids, or hazardous waste is capped at 55 mph statewide, day or night (32-5A-171(4)). Other four-lane highways are 65; two-lane roads generally 55.
What a speeding ticket costs
Graduated fine, county-dependent. Hauling hazmat over 55 is its own violation. Work-zone fines are higher.
Alabama Truck Speed Limit FAQ
What is the truck speed limit in Alabama?
Do trucks have a lower speed limit than cars in Alabama?
What is the speeding penalty for a truck in Alabama?
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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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://law.justia.com/codes/alabama/title-32/chapter-5a/article-8/section-32-5a-171/. See our Terms & Disclaimer.
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