2020 Missouri shipping laws, regulations, rules and limitations for oversize and heavy-haul trucking permits.

Missouri oversize and heavy-haul shipping regulations, permits.Please share your knowledge of Missouri state shipping regulations with other visitors below.

Locate oversize, heavy-haul trucking companies and pilot cars.

Missouri oversize, heavy haul trucking companies and pilot car for hire:

Missouri pilot cars and trucking escorts.
Missouri oversize and heavy-haul trucking companies.

 

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.

Missouri superloads.

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.

Missouri load long and heavy.

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:

QUICK REFERENCE

Length: 90 feet overall length requires 1 rear/ chase pilot car or escort vehicle if highway is not divided.
Width:

  • 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.

Height:

  • 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.

Overhang:

  • 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 MAY 2020

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 Restrictions

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
Phone: 573-751-2871
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.

Missouri cities serviced.

The information contained in these pages is research information primarily for use by oversize and overweight trucking company drivers, dispatchers and pilot car companies. While every effort is put into maintaining the accuracy of this information you must absolutely verify this information with the Missouri State DOT Permits office before commencing movement.

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2 Comments
  1. Missouri Oversize Permits
    in Permits

    MISSOURI OVERSIZE PERMITS INFORMATION
    Important!
    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.

    Missouri DOT Ph#: 888-275-6636

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

    OPERATING TIME: One-half hour before sunrise to one-half hour after sunset, including Saturday and Sunday, except that loads over 14′ wide will not be allowed weekend travel. Travel times are more limited in metropolitan and tourist areas (see Restricted Travel section below). Overweight only up to 112,000 pounds gross with legal size may travel 24 hours except metro and tourist areas.

    RESTRICTED TRAVEL: No travel on major Holidays, and from noon the day before these holidays or holiday weekends. No travel weekdays from 6:30 am to 9:00 am and 3:30 pm to 6:30 pm, in St. Louis city and county (except for route 370), St. Charles County on I-70, route 94 and route 40/61 and , and Jefferson County on I-55 and on routes 21, 30, 141 and 61/67. No travel from 7:00 am to 9:00 am and 4:00 pm – 6:00 pm in the Kansas City area on routes 150, 291, I-470, 291, 152 west to I-435 and inside the area bounded these routes, and inside the city limits of Springfield except on I-44 and Route 65. These metro area curfews do not apply to loads that are overweight only. No permit movement is allowed on Mississippi River bridges in St. Louis on I-70, I-55, I-64 and on route 60/62 to Cairo, IL. During the tourist season, Saturday and Sunday travel are not allowed on routes in Lake of the Ozarks and Branson (within 10 miles of Branson), with the exception of route 65 in Branson area. Tourist season means June 1 through Labor Day at Lake of the Ozarks and through October 31st in Branson area. These curfews are listed in more detail in part 9 of the MO Permit Regulations Booklet, which is available to drivers and should be carried if you do O/D loads in Missouri.

    LEGAL DIMENSIONS

    Length:

    53′ semi-trailer and load (including rear overhang) on Interstate and designated highways
    60′ when more than 10 air miles from designated system
    Width:

    8′-6″ on Interstate, designated highways
    8′ on other roads
    Height:

    14′ on designated highways
    13′-6″ on other roads
    Note: Over height must be on drop-deck trailer to be permitted.

    Weight: 80,000 Gross

    Single – 20,000 (22,000 on secondary)
    Tandem – 34,000 (36,000 on secondary)
    Tridem – 34,000 (8′ of spacing); 42,500 (9′ of spacings)
    Note: Missouri will not give a permit for legal gross weight, but overweight on an axle group.

    ROUTINE PERMIT LIMITS

    Length: 150′

    Width: 16′

    Height: 16′ (15′-7″ maximum on some routes)

    Weight:

    5 axles – 104,000
    6 axles – 120,000
    7 axles (1-3-3) – 130,000
    Single – 20,000
    Tandem – 46,000 (40,000 on a 10′ spread)
    Tridem – 60,000
    Quad – 72,000
    Note: A 1-2-2-1 (tandem drive tractor, tandem trailer and booster) combination is not permitted in Missouri. You must have a Tridem drive tractor to use a tandem trailer and a booster.

    Loads exceeding these dimensions or gross weight over 160,000 pounds are considered as Super Loads.

    ESCORTS

    Length: Over 90′ – one escort on all highways except divided highways

    Width:

    Over 12′-4″ – one escort (two escorts off designated highway system)
    Over 14′ – one escort on Interstate and divided highways
    two escorts required on two-lane and undivided highways
    Height:

    Over 15′-6″ on two-lane & undivided
    Over 15-6″ divided highways – route survey and one escort with high pole. Utility bucket truck may be required to lift wires.
    MISCELLANEOUS: If trailer is stretched, Missouri wants to know how much used and unused space is in well, and on front and rear decks.

    SIGNS, FLAGS & LIGHTS: “Oversize Load” signs are required on front and rear of the load vehicle when width exceeds 10′-6″, and on the rear of the load when overall length exceeds 90′. Flags are required at the extreme ends or projections of all overwidth and overlength loads.

  2. Missouri has a 53 ft trailer length limit (including your load) so if you have a 53ft trailer you cannot overhang front or rear without a permit.

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