Mississippi Transport

Oversize/Overweight Permit And Regulations

Mississippi Oversize Permits & Escort Information

WE ARE NOT A PERMIT SERVICE NOR DO WE ARRANGE PERMITS FOR CARRIERS. THIS IS STRICTLY JUST FOR INFORMATIONAL PURPOSES. WE DO NOT ENSURE THE ACCURACY OF THE BELOW INFORMATION SO BE SURE TO READ YOUR PERMIT SHEETS CAREFULLY!

Mississippi Department of Transportation
Phone Number: (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.

LEGAL DIMENSIONS

Length:

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

ROUTINE PERMIT LIMITS

Length: 120′

Width: 16′

Height:

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

Weight:

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

ESCORTS

Length:

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

Overhang: Over 15′ front or rear – one escort

Width:

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.