A train must not start until the Conductor has given or authorized:

• A. The proper hand signal OR The proper communicating signal OR Permission by voice communication
• B. A written order from the Dispatcher
• C. A verbal command from the Engineer
• D. The signal at the next interlocking only

Answer: (A)

Movement can only start when the Conductor has given clearance, and that clearance may be conveyed in one of three standard ways: a proper hand signal, a proper communicating signal, or permission by voice communication. These methods ensure the crew understands exactly when it’s safe to move and maintains clear, positive authorization from the person in charge on the train.

A written order from the Dispatcher is not required for a normal start, and a verbal command from the Engineer would not authorize movement since the Conductor controls the authority to move. Relying on the signal at the next interlocking is not sufficient here, because that signal governs movements through or beyond the interlocking, not the start permission from this location.