Department of Transportation
MoDOT
Missouri • United States of America
The Missouri Department of Transportation (MoDOT) manages over 33,800 miles of roads — the seventh largest state-maintained road network in the US — centered on one of the nation's critical freight crossroads at St. Louis and Kansas City. Major freight corridors include I-44, I-55, I-64, I-70, I-29, and I-35. Missouri sits at the geographic center of the contiguous US, making it a hub for cross-country freight movement. MoDOT administers commercial vehicle permits, operates over 90 rest areas, and provides the Traveler Information Map (TIM) system for road conditions. The department manages critical Mississippi River bridge crossings essential to freight movement between East and West.
| Official Website | https://www.modot.org/ |
|---|---|
| Data API | https://traveliq.ibi511.com/ |
| Founded | 1907 |
| Headquarters | Kansas City |
Available Data
Social Media
- @StLouisTraffic — MoDOT STL Traffic
Missouri Trucking Regulations
Size & weight limits, OS/OW permits, and seasonal restrictions for commercial vehicles
Weight Limits
| Category | Limit |
|---|---|
| Max Gross Vehicle Weight | 80000 lbs |
| Single Axle | 20000 lbs |
| Tandem Axle | 34000 lbs |
Dimensional Limits
| Category | Limit |
|---|---|
| Max Height | 13.6 ft |
| Max Width | 8.5 ft |
| Max Length (Single Unit) | 40 ft |
| Max Length (Combination) | 65 ft |
OS/OW Permits
Seasonal Restrictions Feb, Mar, Apr
Spring weight restrictions are posted on secondary state and county roads, typically February through April. Primary state highways and Interstates are generally not posted. Contact MoDOT or county road departments for local road posting information.
Weigh Station Bypass
27¢/gal
Member
Special Exemptions
Notable Rules
Missouri is a national freight crossroads — St. Louis sits at the junction of I-44, I-55, I-64, and I-70; Kansas City anchors I-70 and I-35. Missouri has been gradually increasing its diesel fuel tax through annual increments enacted by state legislation. The MO fuel tax rate should be verified annually. I-70 across the state is one of the highest-volume freight corridors in the US.
Sources
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