We are not a permit service.  We do not arrange permits for carriers.  The following is for informational purposes only.  We also do not answer permit and escort requirements.  Always read your permits and provisions sheets carefully. We cannot guarantee the accuracy of the information provided.

Mississippi DOT Ph#: 601-359-1717

PERMITS: Mississippi oversize permits are valid for three days. Must have permit prior to entering the state.

OPERATING TIME: One-half hour after sunrise to one-half hour before sunset, Monday through Saturday, with no Sunday travel allowed. In addition, 24-hour movement (including Sunday) is now being allowed for loads not exceeding 12′ wide, 13′-6″ high, 99′ overall length, 150,000 pounds GVW, 4′ rear overhang. However, when the load is over 10′ wide, an escort is required for night travel.



  • 53’0 trailer
  • 99′ overall length

Overhang: With up to 53′ trailer

  • 3′ front
  • 14′-11″ rear

Width: 8′-6″

Height: 13′-6″

Weight: 80,000 Gross

  • Single – 20,000
  • Tandem – 34,000
  • Tridem – 42,000


Length: 120′

Width: 16′


  • 15′-6″ (over 15′-7″ requires route survey)
  • 16’ (Over 16′ requires route survey, utility company letters, and special approval.)


  • Single – 20,000
  • Tandem – 48,000
  • Tridem – 57,000 (63,000 on Interstate)
  • Quad – 64,000 (72,000 on interstate)



  • Over 95′ – one escort (two on some routes)
  • Over 105′ – two escorts

Overhang: Over 15′ front or rear – one escort


  • Over 13′ – one escort
  • Over 16′ – two escorts
  • Over 10′ wide at night – one escort

Height: The DOT may require an escort with high pole for some routes if conditions warrant. A route survey is required when exceeding 15′-7″ in height.

Miscellaneous: Overweight dozer and blade must be attached, or else hauled on separate loads if blade is detached.

SIGNS, FLAGS & LIGHTS: “Oversize Load” signs are required for all loads exceeding 12 feet wide. Flags are required on all corners of loads (mounted at a height of approximately six feet above the pavement) on loads exceeding 10 feet wide. Loads over 12′ in width require flashing amber lights mounted on the rear of the load and flags on the front corners or the load. Over-length loads and overhang in excess of 4 feet must be flagged.

Permitting Superloads

  • Dimensions defining a “superload” vary by state (see the “Routine Permit Limits” section for states in question).
  • Some states take one to two weeks to approve and issue a superload permit. Expect delays.
  • States may require letters from the shipper, route surveys, district-by-district engineering approvals, etc. which can delay the approval process.
  • Measure your load carefully. An inch or two of added height can make a big difference in routing and turnaround time on a superload.