| Clue | Answer |
|---|---|
|
|
|
| Amtrak's express train (5) | |
| Northeast Corridor train (5) | |
| Amtrak's fastest service (5) | |
| Boston-D.C. service (5) | |
| Metroliner successor (5) | |
| Amtrak option (5) | |
| Amtrak bullet train (5) | |