Interlocking and controlled point signals remain in service unless otherwise specified by?

Interlocking and controlled point signals remain in service unless otherwise specified by?

• A. Timetable
• B. Bulletin Order or Form D line 7
• C. Dispatcher
• D. Company policy

Answer: (B)

Interlocking and controlled point signals are treated as in service by default, and any exception to that status is communicated through formal notices. A Bulletin Order or Form D line 7 is the official mechanism used to specify that those signals are not in service. When such a notice is issued, crews must follow the instructions in the bulletin or Form D rather than relying on the usual signal indications. Timetables lay out regular schedules and rules but do not cover temporary out-of-service conditions. A dispatcher can issue instructions, but the established way to declare signals not in service is through Bulletin Orders or Form D line 7, not through general policy.

Interlocking and controlled point signals are treated as in service by default, and any exception to that status is communicated through formal notices. A Bulletin Order or Form D line 7 is the official mechanism used to specify that those signals are not in service. When such a notice is issued, crews must follow the instructions in the bulletin or Form D rather than relying on the usual signal indications. Timetables lay out regular schedules and rules but do not cover temporary out-of-service conditions. A dispatcher can issue instructions, but the established way to declare signals not in service is through Bulletin Orders or Form D line 7, not through general policy.