| Massachusetts State Highway System | |
|---|---|
   Highway markers for Interstate 90, U.S. Route 20 and Route 28 | |
| System information | |
| Notes | Routes are not always state-maintained, and not all state highways are Routes. |
| Highway names | |
| Interstates | Route I-X or Route X |
| US Highways | Route US X or Route X |
| State | Route X |
| System links | |
The Massachusetts State Highway System in the U.S. Commonwealth of Massachusetts is a system of state-numbered routes assigned and marked by the highway division of the Massachusetts Department of Transportation (MassDOT). U.S. Highways and Interstate Highways are included in the system; the only overlaps are with the end-to-end U.S. Route 3 and Route 3 and the far-apart Interstate 295, shared with Rhode Island, and Route 295, shared with New York State. A state highway in Massachusetts is a road maintained by the state, which may or may not have a number. Not all numbered routes are maintained or owned by the state.