2018 Missouri shipping laws, regulations, rules and limitations for oversize and heavy-haul trucking permits.
Locate oversize, heavy-haul trucking companies and pilot cars.
Missouri oversize, heavy haul trucking companies and pilot car for hire:
Do I need a trucking permit? Legal load limits.
Missouri maximum load limits until and trucking permit is required.
Length: 53 feet maximum. If you overhang in either direction on a 53 foot trailer (even a 1/2 inch) you are required to obtain a permit.
Width: 8 feet 6 inches.
Height: 13 feet 6 inches.
Weight: 80,000 pounds GVW.
Routine oversize and heavy-haul trucking permits.
These maximum dimensions/weights are considered routine oversize and heavy-haul trucking permits in MO:
Length: 53 foot is the maximum. Over 90 feet combined overall requires 1 rear escort. 120 feet can be permitted. Anything over is a superload.
Width: Figure up to 14 feet as a routine permit. Some routes/distances may qualify as routine, see: state laws.
Height: 14 feet and 6 inches depending on routing/distance. To see if others qualify see above “state laws” link.
Weight: Single axle 20,000 pounds, 46,000 pounds on tandem axles, tridem axles 60,000 pounds (no more than 21,000 on any single in combination), quad axles 72,000 pounds (no more than 19,000 pounds on any single axle configurations), 5 axles 104,000 pounds, 6 axles 120,000 pounds, 7 axles (config. 1-2-4) 130,000 pounds, 8 axles 160,000 pounds, 9 axles (config. 1-4-4) 156,000 pounds.
Overhang: Anything over 53 feet in length requires a permit. If you overhang or are in excess of 53 feet by a 1/2 inch you are required to obtain a permit.
Requirements for extra-heavy or over-dimensional (superloads in MO):
All superload shipments are required to have a minimum of 2 million dollars in single limit combined liability insurance. For simplicity a superload in Missouri is any shipment in excess of the above dimensions or weights listed above in “routine”. For complete details of state laws.
When pilot car or escort vehicles are required.
Heavy-haul or oversize loads may be required to be accompanied by a escort vehicle or pilot car if:
Length: 90 feet overall length requires 1 rear/ chase pilot car or escort vehicle if highway is not divided.
- 12 feet and under requires no escort.
- 12 feet and 4 inches will require 1 rear/chase escort vehicle. 1 escort vehicle and 1 pilot car are required on non-designated roads.
- 15 feet 6 inches on 2 lane undivided roads requires a high pole pilot car.
- 15 feet on divided highways requires 1 pilot car with height pole. May need route survey and bucket trucks.
- Anytime lenght of load exceeds 53 feet 1 pilot car is required. Over 90 feet overall may require 1 pilot car and 1 escort.
Notes: If the shipment consists of 2 dimensions being over the legal limits 1 pilot car and 1 escort vehicle are required.
DETAILED REFERENCE – #####updating live June 25th #####
Length: Anything over 90’ requires one rear/chase vehicle.
Width: Two lanes total over 12” 4”’ wide needs one front up to 14’. Four lanes total over 12’ 4” wide requires one rear.
Height: If over 15’ 6” you need a high pole and a rear/chase vehicle and can only move from 6:30 -9:00 am and 3:30 – 6:00 pm on all routes. Over 17’ 5” needs route survey and bucket truck.
Overhang: Anytime load is in excess of 53 feet.
Pilot car and escort vehicle requirements, certifications.
In order to operate a pilot car or escort vehicle in the state of Missouri you are required to have a minimum of the following:
Missouri state laws says pilot car/escort vehicles must be a standard size and have unrestricted vision in the front and rear. Vehicle must be in safe operating condition. “Oversize Load” signs must be displayed towards the front or rear, whichever is applicable. Signs must not be visible when not in service. Signs must be a minimum of 5 feet in length and 1 foot in height. Signs must have a yellow background color with thick (1 inch minimum) black clear, professional print quality lettering. All escort vehicles must be equipped with safety colored red or orange florescent flags that can be mounted on both sides of the front of lead pilot car vehicles or both rear sides of chase escort vehicles. All vehicles involved in shipment must have 2-way radio capabilites. Insurance requirements must be a minimum of $50,000 for personal injury per person. $200,000 for accident/property damage and/or combined single limit liability of $250,000.
Note: Flaggers or any person directing or altering traffic is required to have a “flaggers certification” and be flagger certified.
Travel is restricted if over 12’ 4” wide in most areas to 6:30 am (or a half hour after sunrise) until 9:00 am then resume at 3:30 pm until 6:00 pm (or a half hour before sunset). If over 14’ wide no movement on Saturday or Sunday at all. You may move Monday thru Friday but only. For now, consider this info as a basic guideline for estimates only. Please call the State of Missouri for exact laws. And always be sure to read the instructions on your permit(s).
Missouri DOT and permit contact information.
Physical address and MDOT contact information:
Missouri Department of Transportation, Motor Carriers, Special Permit Office
PO Box 270, Jefferson City, MO 65102
Permit office hours: Monday thru Friday 7:30 am until 3:45 pm.
Missouri legal guidelines: Missouri oversize and heavy-haul regulation laws printed by the state.
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