Mississippi Trucking Regulations
Guide to Mississippi trucking laws, MDOT regulations, weight limits, and Gulf Coast operations.
Weight Limits and Permits
Mississippi follows the federal 80,000 lbs GVW limit on interstate highways. The Mississippi Department of Transportation (MDOT) issues oversize/overweight permits through the Permit Division. Single-trip permits start at $20. Mississippi allows up to 80,000 lbs on most state highways. MDOT operates approximately 8 permanent weigh stations along I-55, I-20, I-59, and I-10. The Mississippi Department of Public Safety (MDPS) Highway Patrol conducts CMV enforcement and inspections. Overweight fines start at $100. Mississippi's permit system is accessible online. The state has relatively lenient enforcement compared to neighboring states, though CVSA blitz participation has increased inspection activity in recent years.
Gulf Coast and Hurricane Operations
Mississippi's Gulf Coast (Biloxi, Gulfport, Pascagoula) is a significant freight hub with the Port of Gulfport and Ingalls Shipbuilding (largest employer in Mississippi). Hurricane preparedness is a regulatory consideration — MDOT activates contraflow plans and commercial vehicle restrictions during hurricane evacuations. The I-10 Gulf Coast corridor handles heavy freight including shipbuilding components, seafood, chemical products from Pascagoula's refineries, and gaming/hospitality supplies. Mississippi follows federal HOS and ELD regulations without state additions. The state enforces IFTA and IRP requirements at weigh stations.
State Requirements
Mississippi requires intrastate carriers to register with the Mississippi Public Service Commission (MPSC) for operating authority. Registration fees are $75. Mississippi does not require periodic safety inspections for commercial vehicles — enforcement relies on roadside inspections. The state has specific agricultural exemptions for timber, cotton, and poultry transport during harvest/processing seasons. Mississippi's extensive poultry industry (top-5 nationally) generates year-round freight from processing plants in the central and southern regions. Timber transport from Mississippi's pine forests is a major freight category, with logging trucks subject to specific weight provisions on designated timber haul routes.