Rail
Rail Transit (Rail Transit) refers to the traffic volume, speed, security, punctuality, protection of the environment, energy conservation and land use and other characteristics of the mode of transport, referred to as "rail", including subway, light rail, maglev, Trams, new traffic systems. Countries in the world generally realize that the fundamental way to solve the problem of urban traffic is to give priority to the development of urban public transport system with rail transit as the backbone.
In the Chinese national standard "urban public transport commonly used noun terms", the urban rail transit is defined as "usually in the power as the driving force, take the wheel and rail operation of the rapid mass transit traffic in general."