Rule 251 Territory: When track is signaled in only one direction, signal indication will be the authority for trains to operate with the current of traffic.

Rule 251 Territory: When track is signaled in only one direction, signal indication will be the authority for trains to operate with the current of traffic.

• A. To operate with the current of traffic.
• B. To operate in either direction on the same track.
• C. To stop and proceed only with permission.
• D. To proceed only with a Form D.

Answer: (A)

When track is signaled for only one direction, the signal indication itself is the authority to move, and trains must follow that direction—the current of traffic. In this one-way signaling setup, you proceed in the direction shown by the signal and do not move against the flow. The other options imply movement in a direction not authorized by the single-direction signal or require extra permissions that aren’t needed when the signal governs movement. So the correct idea is that you operate with the current of traffic.

When track is signaled for only one direction, the signal indication itself is the authority to move, and trains must follow that direction—the current of traffic. In this one-way signaling setup, you proceed in the direction shown by the signal and do not move against the flow. The other options imply movement in a direction not authorized by the single-direction signal or require extra permissions that aren’t needed when the signal governs movement. So the correct idea is that you operate with the current of traffic.