| Regional Transit Authority | Comment | |
| BAT | Brockton Area Transit Authority | NextBus |
| BRTA | Berkshire Regional Transit Authority | |
| CATA | Cape Ann Transit Authority | |
| CCRTA | Cape Cod Regional Transit Authority | NextBus |
| FRTA | Franklin Regional Transit Authority | |
| GATRA | Greater Attleboro-Taunton Regional Transit | |
| GMTA | Greenfield-Montague Transportation Area | |
| LRTA | Lowell Regional Transit Authority | |
| MBTA | Massachusetts Bay Transportation Authority | NextBus |
| MRTA | Montachusett Regional Transit Authority | |
| MVRTA | Merrimack Valley Regional Transit Authority | |
| NRTA | Nantucket Regional Transit Authority | |
| PVTA | Pioneer Valley Transit Authority | |
| SRTA | Southeastern Regional Transit Authority | |
| VTA | Martha's Vineyard Transit Authority | |
| WRTA | Worcester Regional Transit Authority |
This page adapted from Access to Jobs, a "free statewide transportation system for people transitioning from welfare to work". link seems dead