Department of Transportation
MDOT
Maryland • United States of America
The Maryland Department of Transportation (MDOT) manages a complex multi-modal transportation system in one of the nation's most economically significant corridors. Key freight highways include I-95, I-695 (the Baltimore Beltway), I-270, I-83, and US-40. The Port of Baltimore ranks among the top US ports for handling automobiles, farm equipment, and bulk commodities. MDOT's State Highway Administration (SHA) administers commercial vehicle permits, oversees truck weight enforcement, and operates the CHART traffic management system. The department coordinates with the Port Authority and rail operators to support intermodal freight movement critical to mid-Atlantic supply chains.
| Official Website | https://www.mdot.maryland.gov/ |
|---|---|
| Data API | https://chart.maryland.gov/ |
| Founded | 1971 |
| Headquarters | Baltimore |
Available Data
Social Media
- @MD511State — MD511State
Maryland 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 | 13.5 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 state secondary roads, typically February through April.
Weigh Station Bypass
37¢/gal
Member
Special Exemptions
Notable Rules
Maryland has a critical Mid-Atlantic freight position. The Port of Baltimore (including the Dundalk and Seagirt marine terminals) is a major container and vehicle import port. I-95 through the Baltimore metro area (including the Fort McHenry and Baltimore Harbor tunnels) has height restrictions for hazmat — carriers must use the I-695 bypass around the tunnels. I-70, I-83, and the Capital Beltway (I-495) are primary corridors. The Bay Bridge (US-50) connects the Eastern Shore and has weight limitations.
Sources
Categories: