We hope you’re ready for jambalaya, beignets and gumbo, because it’s time to cruise through Louisiana. The state is home to New Orleans jazz, Mardi Gras celebrations and the world’s longest bridge over a body of water. But in order to drive on the Lake Pontchartrain Causeway, you need an Louisiana oversize permit—and we can help.
At The Permit Company, we help you obtain oversize and overweight truck permits by working directly with state and local agencies on your behalf. If you have any questions about moving oversized loads through Louisiana or securing a permit, we have the answers.
1. How long are oversize permits valid for in Louisiana?
Single trip permits are issued for the days requested.
2. What are the legal dimensions for loads in Louisiana?
The legal limits in Louisiana are as follows:
Gross weight: 80,000 lbs.* on all roads
Width: 8’6″ on all roads
Height: 14′ on interstate only, 13’6″ on all other roads
Length: 45′ for single units and buses on all roads; 59’6″ for semi-trailers on designated highways, 65′ overall length on all other roads; 30′ for twins and doubles on designated highways (not allowed on all other roads); 75′ (3′ front and 4′ rear) for auto/boat transporters on all roads; Rocky Mountain doubles, turnpike doubles and triples not allowed on any roads; and 75′ for saddle mounts with three trailing units on designated highways, 75′ on all other roads.
*The Federal Bridge Formula applies.
3. What are the permit limits for loads in Louisiana?
The routine-issue permit limits in Louisiana are as follows:
Weight – 120,000-pound (or less) axle weight:
Single: 24,000 lbs.
Tandem: 48,000 lbs.
Tridem: 60,000 lbs.
Quad: 80,000 lbs.
Trunnion: 54,000 lbs
Weight – more than 120,000-pound axel weight:
Single: 20,000 lbs.
Tandem: 45,000 lbs. with more than 12′ of space between axles
Tridem: 60,000 lbs.
Trunnion: 54,000 lbs.
5 axles: 108,000 lbs.
6 axles: 120,000 lbs.
7 axles: 132,000 lbs.
8 axles: 152,000 lbs.
Maximum weight: 232,000 lbs. with some restrictions
Length: 125′. If vehicle is more than 125′ in length, you must have a steerable dolly. There is no set maximum for the overhang.
Width: 18′. Vehicles more than 16′ wide cannot use the interstate. Any vehicle more than 18′ wide must notify the permit office 48 hours in advance of the move to obtain a route approval.
Height: 16’5″. If vehicle height is over 16’5″, you must notify the permit office 48 hours in advance of move to obtain a route approval.
Tandem axles are properly distributed if neither axle carries more than 60 percent of the weight; tridem axles are properly distributed if each axle carries 25 to 40 percent of the total tridem weight; quad axles are properly distributed if each individual axle carries 20 to 30 percent of the total quad weight.
Vehicles must be registered for the highest gross weight, which is 88,000 lbs. for non-interstate travel and 83,400 lbs. for interstate travel.
If load exceeds any of these dimensions or weights, refer to the section on superloads.
The Western Association of State Highway and Transportation Officials (WASHTO) limits are: 110′ long, 14′ high, 14′ wide and 160,000 lbs.
4. Is continuous travel allowed for oversize permits in Louisiana?
Travel is permitted seven days a week from sunrise to sunset. Vehicles up to 12′ wide may be allowed to travel at night on a case-by-case basis. That request must be submitted when ordering your permit.
Travel is restricted on the following holidays: New Year’s Day, Mardi Gras Day (in certain areas), Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas Day.
5. When are escorts needed in Louisiana?
On all highways:
• One escort (front if on a two-lane highway, rear if on a multi-lane highway) is needed for widths 12′ to 16′.
• One rear escort is needed for lengths 90′-125′
• One height pole is needed for heights of more than 15’10”.
• An escort vehicle may escort two overlength vehicles, but only one overwidth vehicle.
State police escorts:
• A state police escort is needed for widths of more than 16′ on two-lane or multi-lane state highways.
• A state police escort is needed for lengths of more than 125′ on state highways.
• A state police escort is needed, and special requirements will be necessary, for heights of more than 18′ on state highways.
• In all instances that require a state police escort, the permittee is responsible for paying the police escort fee and any overtime pay of the off-duty Trooper. Travel through metropolitan areas may require city or parish escorts and/or permits.
Police escorts other than State Police:
• Baton Rouge City Police: 225-389-3874
• Jefferson Parish Sheriff’s Office: 504-598-5880
• New Orleans City Police: 504-658-6205
• St. Bernard Parish Sheriff’s Office: 504-278-7677
• Shreveport: 318-673-7255
6. What is a superload in Louisiana?
Guidelines for submitting overweight vehicle configurations exceeding 232,000 lbs.
1. Submit a drawing of the assembled vehicle showing:
a. The location of the centerline of each axle
b. The spacing and size of the wheels on each axle
c. The tare (unloaded tractor/trailer combination) weight of each axle in pounds
d. The location of the kingpin of the trailer
e. The location of the kingpin of each jeep combination
f. The width and length of the flat bed (if applicable)
g. The location of the load on the hauling combination, including tractor(s)
h. The height of the load on the hauling combination
2. Submit a drawing showing:
a. The outside dimensions of the load to be hauled, which should show the side and end elevations and plan views
b. The weight of the load and the total weight for each axle in pounds
c. The center of gravity of the load
3. Submit a map showing the proposed route and any alternate proposed routes in order of preference.
4. In the event that there are one or more alternate modes of transportation that cannot accommodate the load (such as a waterway or rail), but substantially reduces the length of haul on the State highway system, evidence of the physical and/or regulatory impasse(s) must be submitted with the permit request. This evidence must be a written response from the facility’s authorities or offices stating the nature of the impasse that will not accommodate the load.
5. Statement from the owner of the load certifying its gross weight. Approximate approval time: one week.
6. Permission to move loads exceeding 232,000 lbs. should be made at least eight to 12 weeks in advance of the move.