| 13001 | T | SchBus 13001 | School Buses (Anne Arundel) | Schools |
| 14001 | T | SchBus 14001 | School Buses | Schools |
| 17001 | T | SchBus 17001 | School Buses (Prince George's/Anne Arundel) | Schools |
| 19001 | T | SchBus 19001 | School Buses (Anne Arundel) | Schools |
| 30040 | T | DC Hypo Vans | DC Hypothermia Vans (also used for social services transport) | Public Works |
| 30065 | T | Mortons Towing | Morton's Towing and Recovery (Clarksburg, MD) | Business |
| 30066 | T | Tow 30066 | Tow Truck Company (Prince George's County, MD) Ch. 2 | Business |
| 30070 | T | Tow 30070 | Tow Truck | Business |
| 30085 | T | SuperiorConc | Superior Concrete (DC) | Business |
| 30086 | T | Concrete 30086 | Concrete (Virginia locations) | Business |
| 30090 | T | Tour Bus 30090 | Tour Bus Company (DC) | Business |
| 30095 | T | Taxi 30095 | Taxi (Baltimore Area) | Transportation |
| 30121 | T | McDelsTowing | McDel's Towing | Business |
| 30160 | T | BWI Air Taxi | BWI Airport Taxi | Transportation |
| 30165 | T | Garbage? | Garbage? | Business |
| 30170 | T | Tow 30170 | Tow Truck (Baltimore) | Business |
| 30202 | T | Dillon's Bus | Dillon's Bus Service - Hanover B | Transportation |
| 30305 | T | WTOP Traffic | WTOP Traffic Reporting | Media |
| 30350 | T | SchBus 30350 | School Bus (weekday PM, routes D/E, Long Branch) | Schools |
| 30360 | T | Aggreg 30360 | Aggregate Industries (Prince George's) | Business |
| 30361 | T | Aggreg 30361 | Aggregate Industries (Montgomery/DC) (513xx units) | Business |
| 30362 | T | Aggreg 30362 | Aggregate Industries ("Crofton to Greenbelt") (515xx units) | Business |
| 30363 | T | Aggreg 30363 | Aggregate Industries ("Greenbelt Dispatch") (516xx units) | Business |
| 30366 | T | Aggreg Indu Balt | Aggregate Industries (Baltimore) | Business |
| 30400 | T | BWI RI/Ctyd | BWI Airport Hotel Shuttle (Residence Inn, Courtyard) | Business |
| 30405 | T | Garbage30405 | Garbage | Business |
| 30406 | T | Garbage30406 | Garbage (Howard County area) | Business |
| 30407 | T | Garbage 30407 | Garbage | Business |
| 30408 | T | Garbage30408 | Garbage (Prince George's locations) | Business |
| 30411 | T | Garbage30411 | Garbage | Business |
| 30412 | T | Garbage30412 | Garbage (Howard County/Anne Arundel County) | Business |
| 30413 | T | Garbage30413 | Garbage | Business |
| 30420 | T | MTA Buses | MTA Buses 201/505/515 (buses to Frederick/Hagerstown/BWI) | Transportation |
| 30425 | T | Trnsp Serv | Transportation Service (Fort Hunt/Mount Vernon area) | Transportation |
| 30440 | T | Radio Test 30440 | Radio Testing | Business |
| 30465 | T | RnR Marathon 18 | Rock 'n Roll Marathon (2018) | Business |
| 30470 | T | ArlCem Shuttle 1 | Arlington National Cemetery Shuttles Ch. 1 | Business |
| 30471 | T | ArlCem Shuttle 2 | Arlington National Cemetery Shuttles Ch. 2 | Business |
| 30480 | T | Paratransit30480 | Paratransit (Montgomery County) | Transportation |
| 30495 | T | RnR Marathon 17 | Rock 'n Roll Marathon (2017) | Business |
| 30501 | T | MSFTInsp17ShutDr | Microsoft Inspire 2017 - Shuttle Drivers | Business |
| 30502 | T | MSFTInsp17ShCoor | Microsoft Inspire 2017 - Shuttle Coordinators | Business |
| 30520 | T | AIPAC Policy Bus | AIPAC Policy Conference 2017 (Buses) | Business |
| 30545 | T | 58PIC Bus545 | 58th Presidential Inauguration - Buses | Transportation |
| 30546 | T | 58PIC Bus546 | 58th Presidential Inauguration - Buses | Transportation |
| 30547 | T | 58PIC Bus547 | 58th Presidential Inauguration - Buses | Transportation |
| 30548 | T | 58PIC Bus548 | 58th Presidential Inauguration - Buses | Transportation |
| 30549 | T | 58PIC Bus549 | 58th Presidential Inauguration - Buses | Transportation |
| 30550 | T | 58PIC Bus550 | 58th Presidential Inauguration - Bus Coordination | Transportation |
| 30551 | T | 58PIC 30551 | 58th Presidential Inauguration - Transportation/Crowd Control? | Transportation |
| 30555 | T | 58PIC 30555 | 58th Presidential Inauguration - Transportation Supervisors? (Ch. 1?) | Transportation |
| 30556 | T | 58PIC 30556 | 58th Presidential Inauguration - Transportation Supervisors? (Ch. 2) | Transportation |
