Which of the following describes how a platform boundary should be maintained?

• A. Stay behind the yellow line and maintain distance from the edge.
• B. Stand at the edge.
• C. Step onto the edge to guide every passenger.
• D. Ignore the boundary during busy times.

Answer: (A)

Maintaining a platform boundary is about keeping a safe distance from the edge to prevent accidents. The yellow line marks the safe zone, and staying behind it gives you a buffer in case a train arrives unexpectedly and gives you room to react. It also helps protect passengers by preventing crowding at the edge where there’s a higher risk of someone slipping or being pulled toward the tracks.

Why this is the best approach: it maximizes safety for both staff and riders by creating a clear, consistent space away from moving trains and the edge. Standing at the edge reduces reaction time and increases the chance of a dangerous encounter with a train or with passengers pushing forward.

Stepping onto the edge to guide passengers introduces direct risk to you and others and undermines the protective boundary. Ignoring the boundary during busy times eliminates the built-in safety buffer that the line provides, making accidents more likely when crowds move quickly or unpredictably.