Light rail is an important form of urban rail construction, and also the most rapid developing form of rail transit in the world. Light rail's locomotive weight and carrying capacity is smaller than the general train, the use of the track quality is light, only 50kg per meter, so called "light rail". Urban light rail has the advantages of large volume, fast speed, small pollution, less energy consumption, on-time operation and high safety. Urban Rapid rail Transit system is composed of city light rail, subway, urban railway and other rail transit forms. It can effectively alleviate the tension between population and transportation resources, automobile and transportation facilities. As an effective carrier to improve the present situation of urban traffic, light rail has become an important choice of modern metropolis. It is to a great extent convenient for passengers to travel, so that residents enjoy a higher quality of life. Light rail is also more in line with the green traffic standards, the track extension of the large-scale municipal facilities construction, more conducive to environmental management.
Light rail transit has a positive effect on the growth of national economy, which will bring social and economic benefits. It will lead to the development of related industries, from real estate development and business operations, the direct recovery of investment costs. The construction of urban light rail will promote the continuous improvement of urban planning, accelerate the process of residential suburbanization, and make the unreasonable structure of urban layout adjustment. Along the track will become the most dynamic region, and thus become the first choice of real estate development and urban emerging industries. New residential areas, industrial and commercial facilities will be used to demarcate land patterns along the tracks. Light rail construction occupies an important position in the city process of a country and a region. It can meet the needs of economic, social and urban development. Highlighting the characteristics and functions of the city, speeding up the realization of modernization, will have a positive impact on urban layout, urban appearance, environmental protection, housing construction, residents ' living mode and life style.