The length and width of the three luggage models are as follows:

1, Type A subway train: 22.8m long and 3m wide.

2. Type B subway train: 19 meters long and 2.8 meters wide.

3. Type C subway train: length19m, width 2.6m..

ingredient

Tunnels: Many tunnels operated by underground railways are smaller than those on main trunk lines; Therefore, generally speaking, the trains on the underground railway are relatively small. Sometimes tunnels even affect the shape design of trains, such as some trains in the London Underground.

Power: Most urban rail systems use distributed power (that is, EMU trains) instead of centralized power. If centralized power supply is adopted, push-pull operation is often adopted.

System: Some advanced systems have begun to introduce automatic train operation system. Conductors in London, Paris, Singapore, Guangzhou, China, Taiwan Province and Hongkong don't need to control the train. A more advanced rail transit system can realize unmanned driving. For example, Vancouver Skytrain, the longest automatic LRT (Light Rapid Transit System) system in the world, all stations and trains in the whole LRT are "unattended". Guangzhou Metro APM Line and Shanghai Metro 10 Line are all unmanned, and drivers only monitor them.

Vehicles: The original urban rail system vehicles were made of wood, and later they were made of steel to reduce the risk of fire. Since the opening of 1953, the Toronto Metro has been improved to aluminum, which has effectively reduced the maintenance cost and weight.