| ADA | Americans with Disabilities Act |
| BTC | blind trailer coach |
| CTC | cab control coach |
| DBE | Disadvantaged Business Enterprise |
| MBTA | Massachusetts Bay Transportation Authority |
| ODRL | Operator Deliverable Requirement List |
| OSA | Office of the State Auditor |
| TRAC | Ticket Revenue Accounting Channel |
| TRMS | Train Resource Management System |
| US DOT | US Department of Transportation |
| Date published: | March 4, 2025 |
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