How should conflicts between two warrants for the same track segment be resolved?

• A. The oldest warrant always wins and the other is canceled.
• B. The faster train has priority.
• C. Both warrants remain in effect; the occupant must vacate when possible.
• D. Dispatchers assess priorities and coordinate reissuance or cancellation to prevent overlapping occupancy.

Answer: (D)

Conflicts over warrants for the same track segment require active authority management to prevent two trains occupying the same piece of track at once. Dispatchers evaluate relative priorities, timing, and safety considerations, then coordinate adjustments by reissuing a new warrant for one movement or canceling one of the warrants so only one train has active authority for that segment at a time.

This approach is necessary because simply applying an oldest-wins rule or letting both warrants stay in effect with the occupant vacating later can create unsafe overlap. Speed or age of a warrant isn’t the determining factor; the safe, orderly flow of traffic comes from dispatcher-driven resolution that aligns with the current plan and track occupancy.