| Answer | Crossword Clue |
|---|---|
| THET | Boston bus-and-subway system, familiarly |
| THET | Subway and bus system of Boston, familiarly |
| MARTA | Atlanta's subway and bus system |
| MTA | Boston subway system, formerly |
| BLUELINE | Part of Boston's subway system that runs under Boston Harbor |
| ORANGELINE | Part of the subway system in Chicago, Boston or D.C. |
