Indian passenger trains typically have a maximum of 24 coaches due to practical constraints. The train’s length is determined by the loop line and platform length. To avoid collisions, the train must fit within the loop line.
Additionally, both ends of the train should have easy access to the platform. A loop line in Indian Railways is typically around 650 meters long, accommodating up to 24 carriages and an engine. Thus, commuter trains are equipped with this optimal configuration.