Outside CTC territory, when track authority includes a station with a siding, the authority will specify which siding switch the movement is authorized to or from.

• A. Which siding switch the movement is authorized to or from
• B. The siding location and direction
• C. Maximum speed through the siding
• D. The time window for the siding operation

Answer: (A)

In track authority, the route to or from a siding must be defined with precision. When a station has a siding, the authority identifies the exact switch to be used so the movement’s path is uniquely determined and protected. This switch-level detail ties directly to how routing is controlled in non-CTC territory: it leaves no ambiguity about which turnout the train will enter or leave, preventing conflicts with other movements and ensuring the interlocking protection is applied to the correct path.

Speed through the siding and timing aren’t the primary means of identifying the movement’s path; those factors are governed by other rules, limits, or timetables. The critical piece that makes the authority deterministically actionable is specifying the exact siding switch.