Mississippi Truck Speed Limit
No split. Trucks and cars share the same 70 mph cap on interstates and four-lane controlled-access highways (Miss. Code 63-3-501). A 2025 bill to raise it to 75 passed the House but did not become law, so 70 still stands. Minimum speed is 40 where 70 is posted (63-3-509).
How fast a truck can run in Mississippi
No split. Trucks and cars share the same 70 mph cap on interstates and four-lane controlled-access highways (Miss. Code 63-3-501). A 2025 bill to raise it to 75 passed the House but did not become law, so 70 still stands. Minimum speed is 40 where 70 is posted (63-3-509).
Truck-specific rules and quirks
- 40 mph minimum where 70 is posted (Miss. Code 63-3-509)
- One of the last states at a flat 70. A 2025 House bill (HB 74) to raise interstates to 75 passed the House but did not become law, so 70 still stands.
What a speeding ticket costs
Graduated fine set by local courts, varies by county. Work-zone fines double.
Mississippi Truck Speed Limit FAQ
What is the truck speed limit in Mississippi?
Do trucks have a lower speed limit than cars in Mississippi?
What is the speeding penalty for a truck in Mississippi?
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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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/mississippi/title-63/chapter-3/article-11/section-63-3-501/. See our Terms & Disclaimer.
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