Ballast, typically made of crushed stone or gravel, supports the sleepers and distributes the train's weight evenly to the subgrade.

A 'rake' is a complete formation of railway coaches or wagons that are coupled together to form a train unit.

Indian Railways specify a minimum braking distance of approximately 500 meters for trains traveling at 100 km/h under normal conditions.

Buffers are spring-loaded devices that absorb shocks and minimize damage during coupling and uncoupling of railway carriages.

Indian railways predominantly use broad gauge (1676 mm) which covers approximately 43,000 km of the total network.

A turntable is a rotating platform used in railway depots to turn locomotives around and position them for maintenance and service.

A red signal in railway signaling is a mandatory stop signal indicating that trains must not proceed beyond that point.

Standard platform height in Indian Railways is 0.75 meters (2.5 feet) for broad gauge to ensure safe passenger boarding.

Gradient refers to the slope or angle of incline/decline of the railway track, expressed as a percentage or ratio.

Ultrasonic testing devices are used to detect cracks and breaks in rails without damaging them.