Describe the concept of a braking curve.

• A. A chart showing deceleration rates and stopping distances at different speeds.
• B. A map of the station.
• C. A timetable.
• D. A list of train operators.

Answer: (A)

The braking curve shows how fast a train can be decelerated and how far it will travel while braking at different speeds. It is a chart that maps stopping distance against speed, often with separate lines for different braking efforts (like service or emergency braking). This lets operators predict whether a train can stop within a given distance and plan safe braking points on the track, taking into account how deceleration changes with speed and braking force.

Other choices don’t fit because they describe station geography, scheduling, or personnel, none of which convey how braking performance relates to speed and stopping distance.