Before performing work on a track, what must be ensured to protect trains?

• A. Protection against trains in both directions has been provided in ABS, DCS, or Interlockings
• B. Only a single-direction protection is required
• C. No protection needed if work is minor
• D. Protection is the responsibility of the crew performing the work

Answer: (A)

Before doing work on the track, trains must be prevented from entering the work area from either direction. This protection is provided by the signaling systems in place on the line—ABS (Automatic Block Signals), DCS, or an interlocking. These systems establish safe limits and control signals so trains cannot proceed into the work zone while workers are present. One-direction protection won’t suffice because a train could approach from the other end, and there would be no guarantee of warning. Minor tasks still require this protection, and while the supervisor or person in charge coordinates it, the essential requirement is that protection against trains in both directions is in place.