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03/13/2025
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Federal regulations
Mississippi has adopted Part 392 of the Federal Regulations.
Applicability
Part 392 applies to commercial motor vehicles operated in intrastate commerce with a gross vehicle weight rating or gross combination weight rating of 26,001 pounds or more, or vehicles transporting a placardable amount of hazardous materials.
Speed limit
Truck speed limits in Mississippi are 70 mph on rural interstates, 65 mph on 4-lane highways, and 55 mph on all other highways unless otherwise posted.
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