Which statement about the platform edge safety line is true?

• A. A decorative stripe on the platform for aesthetics.
• B. A painted line indicating safe distance.
• C. A tactile cue to guide blind passengers.
• D. A painted or marked line on the platform indicating the safe distance from the track when trains are present.

Answer: (D)

The main idea here is the boundary that tells passengers how far to stand from the edge of the platform when a train is present. The statement that a platform edge safety line is a painted or marked line on the platform indicating the safe distance from the track when trains are present captures that boundary and its purpose exactly. It communicates the hazard posed by approaching or nearby trains and gives a clear, repeatable cue for where it’s safe to stand.

Decorative stripes aren’t about safety and don’t convey any distance or hazard warning. A painted line indicating safe distance is close, but it omits the explicit context of “when trains are present,” which matters because the risk is tied to train movement. The tactile cue option describes a different safety feature intended to guide visually impaired passengers along the platform edge, not the specific safe-distance line used to keep people away from the track when trains are there.