If the train dispatcher stops a train while it is moving through a control point, the train must not move in either direction until receiving:

If the train dispatcher stops a train while it is moving through a control point, the train must not move in either direction until receiving:

• A. A proper signal.
• B. Authorization from the train dispatcher.
• C. A green flag.
• D. A written clearance.

Answer: (A)

Movement through a control point is governed by the signaling system. When the dispatcher stops a train to protect the area, you must wait until a proper signal is shown that authorizes moving again. The signal confirms the interlocking has set the correct route and that the track ahead is safe, providing the official authority to proceed. Verbal authorization alone isn’t the standard authority for moving at a control point because it bypasses the signaling protection and could create conflicting or unsafe conditions. A green flag is an older, nonstandard method in modern operations, and a written clearance isn’t the immediate form of authority you rely on at a control point. So you move only when a proper signal indicates you may.

Movement through a control point is governed by the signaling system. When the dispatcher stops a train to protect the area, you must wait until a proper signal is shown that authorizes moving again. The signal confirms the interlocking has set the correct route and that the track ahead is safe, providing the official authority to proceed. Verbal authorization alone isn’t the standard authority for moving at a control point because it bypasses the signaling protection and could create conflicting or unsafe conditions. A green flag is an older, nonstandard method in modern operations, and a written clearance isn’t the immediate form of authority you rely on at a control point. So you move only when a proper signal indicates you may.