Department of Transportation
MassDOT
Massachusetts • United States of America
The Massachusetts Department of Transportation (MassDOT) manages over 9,000 lane miles of highway in one of the nation's most densely populated states, including critical Northeast freight corridors along I-90 (the Massachusetts Turnpike), I-93, I-95, I-495, and US-1. MassDOT oversees commercial vehicle regulations including the restrictions on the Tobin Bridge and other weight-sensitive infrastructure. The agency administers truck permits, manages weigh-in-motion stations, and operates the MA511 system for real-time traffic alerts. MassDOT also coordinates with the MBTA and MassPORT to ensure seamless intermodal freight connections at Logan Airport and the Port of Boston.
| Official Website | https://www.mass.gov/orgs/massachusetts-department-of-transportation |
|---|---|
| Data API | https://www.mass.gov/service-details/highway-data-for-developers |
| Founded | 2009 |
| Headquarters | Boston |
Available Data
Social Media
- @MassDOT — Mass. Transportation
Massachusetts 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 | 22400 lbs |
| Tandem Axle | 36000 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 and local roads, typically February through April. Massachusetts has extensive secondary road networks with older infrastructure prone to frost damage. Local road postings vary significantly by municipality.
Weigh Station Bypass
24¢/gal
Member
Special Exemptions
Notable Rules
Massachusetts allows higher axle weights on paved state roads (22,400 lbs single, 36,000 lbs tandem). The Port of Boston is an active freight gateway. I-90 (Mass Pike), I-93, I-95, and I-495 are primary freight corridors. Boston-area congestion is severe; many local roads prohibit commercial vehicles outright. Many older bridges throughout the state have posted weight limits below legal maximums.