What is the minimum sighting distance required in Inner Suburban area?

What is the minimum sighting distance required in Inner Suburban area?

• A. 400 metres
• B. 4550 metres
• C. 500 metres
• D. 455 metres

Answer: (D)

Minimum sighting distance is the distance ahead that a train driver must be able to see a signal or hazard in order to react and stop safely. In inner suburban areas, trains travel at moderate speeds and the track layout includes stations, curves, and other potential obstructions, so visibility must be long enough for a driver to notice a signal at danger, begin braking, and stop within the train’s braking capability and reaction time. The standard distance chosen for this environment is about four hundred fifty-five metres, which provides a practical balance between timely detection and realistic stopping performance. Longer distances aren’t usually necessary here, while shorter distances wouldn’t give a safe amount of time to react and brake in typical conditions.

Minimum sighting distance is the distance ahead that a train driver must be able to see a signal or hazard in order to react and stop safely. In inner suburban areas, trains travel at moderate speeds and the track layout includes stations, curves, and other potential obstructions, so visibility must be long enough for a driver to notice a signal at danger, begin braking, and stop within the train’s braking capability and reaction time. The standard distance chosen for this environment is about four hundred fifty-five metres, which provides a practical balance between timely detection and realistic stopping performance. Longer distances aren’t usually necessary here, while shorter distances wouldn’t give a safe amount of time to react and brake in typical conditions.