With six national park, 40 state parks, two major rivers running through the state and more than 6,000 caves, Missouri has tons of beautiful natural sites to visit as you’re driving through the state. But if you’re planning to transport an oversized load, you’ll need a Missouri oversize truck permit.
If you need assistance obtaining a permit, we at The Permit Company can help. We work directly with state and local agencies on your behalf to take the hassle out of obtaining oversize and overweight truck permits. Below you can find everything you need to know about moving oversized loads through Missouri and how to obtain the necessary permits.
1. How long are permits valid for?
Single trip permits are valid for seven (7) travel days – pre-issued permits will be issued for seven (7) days. While Missouri State Highway Patrol honors electronic permits via, electronic devices, such as a smartphone it is preferred that drivers carry physical paper permits in their vehicles with them.
2. Are there legal limits for loads in Missouri?
Yes, legal permit limits can be seen below:
- Gross Weight: 80,000 lbs. on all other roadways (federal bridge formula applies)
- Width: 8’6” for all roads
- Height: 14’ on designated highways; 13’6” on all other roads
- Length: 45’ for Single Unit and Buses;
- 53’ for Semi-trailers;
- 28’ for Twins/Doubles and 65’ overall for all other roads;
- 75’+ overhang for Autotransporters;
- 75’ for Stinger steered; 65’ over 10 miles off designated system for all other roads;
- 20 miles into Rocky Mtn. doubles – not allowed on all other roads
- Missouri from Western for Turnpike Doubles – not allowed on all other roads
- Border on specific routes by special permit for Triples – not allowed on all other roads
- Nothing over 97’ and only up to 3 units for Saddlemounts; only up to 3 units allowed on all other roads
3. Are there truck permit limits in Missouri? What are they?
Yes, the truck permit limits in Missouri vary based on gross weight, length, width, height and weight. They are as follows:
- Single: 20,000
- Tandem: 46,000
- Tridum: 60,000
- Quad: 72,000
- Gross Weight:
- 5 Axles: 104,000
- 6 Axles: 120,000
- 7 Axles (1-2-4): 130,000
- 7 Axles (1-2-3-1 & 1-3-2-1): 138,000
- 7 Axles (1-2-2-2): 150,000
- 8 Axles (1-3-4): 144,000
- 8 Axles (All other config.): 160,000
- 9 Axles (1-4-4): 156,000
- Length: 150’
- Width: 16’
- Height: 16’—Over 17’ requires approval from utility companies.
4. Is continuous travel allowed for oversize permits in Missouri?
Travel is allowed all day Saturday and Sunday except in metropolitan and tourist areas. Any loads over 14’ wide are not allowed to travel on weekends. If a load is only overweight, you may travel 24-hours.
All travel must be on the basis of a written application and single trip, one-way permit that should be issued by either the district or headquarters office.
Travel through Metro areas of St. Charles, Kansas City and Springfield are prohibited between the hours of 7:00-9:00 AM and 4:00-6:00 PM on or within the following routes or areas: St. Louis restricted between 6:30-9:00 AM and 3:30-6:00 PM.
Travel is barred during the following Holidays:
- New Year’s Day
- Memorial Day
- Labor Day
- Independence Day
- Christmas Day
- Thanksgiving Day
Note that travel will be restricted at 12:00 PM the day preceding the holiday or the holiday weekend period.
5. When are escorts needed in Missouri?
Escorts are required on interstates and other divided highways. Both front and rear escorts are required for all multi-lane undivided and 2-lane highways – one escort in the front one escort in the rear. Please note O/O conveys are not allowed.
- 2-Lane & Undivided Highways:
- Width over 12’4” to 14’, 2-lane undivided – 1 front escort required 1 rear escort
- Width over 12’4” to 14’, off designated highways; 1 front escort 1 rear escort
- Width over 14’ to 16’; 1 front escort 1 rear escort
- Length over 90’ for a combo unit on all highways except divided highways; 1 rear escort
- Height over 15’6” and route survey; 1 escort with H.Pole
- Interstate and Divided Multi-Lane Highways:
- Width over 12’4” to 16’ 1 rear escort
- Height over 15’6” and route survey 1 escort with H.Pole
- Additional factors determining escorts
- Flagmen may be mandatory in some cases, such as a load is equal to or over the width of a lane or on a 2-lane bridge where movement infringes on the neighboring lane. An escort may act as a flagman when necessary.
- Special escort requirements may be specified if size, operation of move or speed may require them.
What is a Superload in Missouri?
According to Missouri, loads that exceed aforementioned routine-issued dimensions and weights, including gross and axles are measured as superloads. There are many exceptions and classifications because of this, so if you have questions feel free to reach out to us via email or phone for additional emails.