Trains must receive a Form D before departing a TBS on a main track.

Trains must receive a Form D before departing a TBS on a main track.

• A. False
• B. True
• C. Not required
• D. Only for passenger trains

Answer: (B)

When operating under a Track Bulletin System, leaving a TBS to go onto the main track requires a Form D. That Form D is the dispatcher’s authority for the specific movement, giving you the main-track route, speed, limits, and the train’s identity. It protects the movement on the main line by ensuring the dispatcher has approved the departure and that the required protections are in place. Having this Form D in effect before departing from the TBS prevents uncoordinated movements on the main track and helps avoid conflicts with other trains or signals. It isn’t limited to passenger trains; it applies to all trains.

When operating under a Track Bulletin System, leaving a TBS to go onto the main track requires a Form D. That Form D is the dispatcher’s authority for the specific movement, giving you the main-track route, speed, limits, and the train’s identity. It protects the movement on the main line by ensuring the dispatcher has approved the departure and that the required protections are in place.

Having this Form D in effect before departing from the TBS prevents uncoordinated movements on the main track and helps avoid conflicts with other trains or signals. It isn’t limited to passenger trains; it applies to all trains.