Oversize Load Permits & Regulations in Mississippi

• Validity: Mississippi oversize permits are valid for three days.
• Requirement: Permits must be obtained before entering the state.

• General Travel: Allowed from 30 minutes after sunrise to 30 minutes before sunset, Monday through Saturday (no Sunday travel).
• 24-Hour Movement: Permitted for loads meeting the following:
  • Width: ≤ 12′
  • Height: ≤ 13′-6″
  • Length: ≤ 99′
  • GVW: ≤ 150,000 lbs
  • Rear overhang: ≤ 4′
• Escort Requirement for Night Travel: If the load exceeds 10′ wide, escort services are required for night travel.

Length:

• Trailer: 53′ max
• Overall length: 99′ max

Overhang:

• Front: 3′ max
• Rear: 14′-11″ max

Width:

• Width: 8′-6″ max

Height:

• Height: 13′-6″ max

Weight Limits:

• Gross weight: 80,000 lbs
• Single axle: 20,000 lbs
• Tandem axle: 34,000 lbs
• Tridem axle: 42,000 lbs

• Length: Up to 120′
• Width: Up to 16′
• Height:
  • 15′-6″ max (exceeding 15′-7″ requires a route survey)
  • 16′ max (exceeding this requires route surveys, utility approvals, and special permits)
• Weight Limits:
  • Single axle: 20,000 lbs
  • Tandem axle: 48,000 lbs
  • Tridem axle: 57,000 lbs (63,000 lbs on Interstates)
  • Quad axle: 64,000 lbs (72,000 lbs on Interstates)

Length Escorts:

• Over 95′: 1 escort (2 on some routes)
• Over 105′: 2 escorts

Overhang Escorts:

• Front or rear overhang > 15′: 1 escort

Width Escorts:

• Over 13′: 1 escort
• Over 16′: 2 escorts
• Over 10′ at night: 1 escort

Height Escorts:

• Exceeding 15′-7″: Route survey required; high-pole escort may be mandated.

Signs & Markings:

• “Oversize Load” Signs: Required for loads > 12′ wide.
• Flags: Must be placed on all corners (approx. 6′ above pavement) for loads > 10′ wide.
• Flashing amber lights: Required on the rear for loads > 12′ wide.
• Over-length loads: > 4′ overhang must be flagged.

• Superload dimensions vary by state (check routine permit limits).
• Some states take 1-2 weeks for approval.
• Additional requirements:
  • Shipper letters
  • Route surveys
  • Engineering approvals
• Accurate measurements are critical—even an extra inch can impact routing and approval time.