The following information about Missouri Oversize Permits is for informational purposes only. It’s important to always read your permits and provisions sheets carefully as we cannot guarantee the accuracy of the information provided. If you have any questions or need assistance, you can contact the following number.

Missouri DOT #: 888-275-6636

Missouri Oversize Permits Duration

Missouri oversize permits are effective for a period of seven days and must be obtained before entering the state.

Operating Time

Travel is permitted from one-half hour before sunrise to one-half hour after sunset, encompassing both Saturday and Sunday. However, loads exceeding 14 feet in width are not allowed weekend travel. Travel times are further restricted in metropolitan and tourist areas (refer to the Restricted Travel section below). For overweight loads up to 112,000 pounds gross with legal size, 24-hour travel is allowed, excluding metropolitan and tourist areas.

Restricted Travel in Missouri

No travel is permitted on major holidays and from noon the day before these holidays or holiday weekends. Weekdays in St. Louis city and county (except for route 370), St. Charles County on I-70, route 94, and route 40/61, as well as Jefferson County on I-55 and on routes 21, 30, 141, and 61/67, have restricted travel hours from 6:30 am to 9:00 am and 3:30 pm to 6:30 pm. In the Kansas City area on routes 150, 291, I-470, 291, 152 west to I-435, and inside the area bounded by these routes, and within the city limits of Springfield (except on I-44 and Route 65), travel is prohibited from 7:00 am to 9:00 am and 4:00 pm to 6:00 pm. These metro area curfews do not apply to loads that are overweight only.

Moreover, 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 the Branson area. The tourist season is defined as June 1 through Labor Day at Lake of the Ozarks and through October 31st in the Branson area. These curfews are detailed in part 9 of the Missouri Oversize Permits Regulations Booklet, which is available to drivers and should be carried if handling oversize and overweight loads in Missouri.

Get Permit Now

Call (832) 454-5883 For Permit Consultation

Legal Dimension for Missouri 

Oversize Load Permits

Length:

  • A 53-foot semi-trailer and its load, inclusive of the rear overhang, are permissible on Interstates 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: To be permitted, over-height loads must be transported on a drop-deck trailer.

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 Oversize Permits does not issue permits for loads that are within legal gross weight but overweight on a specific axle group.

Routine Permit Limits at Missouri

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: In Missouri, the configuration of 1-2-2-1 (tandem drive tractor, tandem trailer, and booster) is not permitted. To use a tandem trailer and a booster, a tridem drive tractor is required.

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

Missouri Oversize Permits image

Escort Requirements for Missouri Oversize Permits

Length:

For loads exceeding 90 feet in length, one escort is required on all highways, with the exception of 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
  • For loads exceeding 15 feet 6 inches in height on divided highways, a route survey and one escort with a high pole are necessary. Additionally, a utility bucket truck may be required to lift wires.

Miscellaneous

When a trailer is extended, Missouri requires information regarding the amount of used and unused space in the well, as well as on the front and rear decks.

Signs, Flags & Lights for Missouri Oversize Permits

Oversize Load” signs must be displayed on both the front and rear of the load vehicle when the width exceeds 10 feet 6 inches. Additionally, these signs are required on the rear of the load when the overall length exceeds 90 feet. Flags must be affixed at the extreme ends or projections of all overwidth and overlength loads.