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

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

If freight:passenger = 3:5 and passenger trains = 45, then freight trains = (3/5) × 45 = 27 trains

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

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

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

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

AC traction systems are more efficient and require lighter overhead equipment compared to DC systems, making them economical for long-distance routes.

The diesel engine is the primary component that converts the chemical energy stored in diesel fuel into mechanical energy through combustion.

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