Generally speaking, urban rail transit is still in the initial stage of development in most countries around the world, and the development mechanism is still not perfect, but the enthusiasm for the construction of urban rail transit is rising day by day. With the acceleration of the pace of urbanization, the city is constantly radiating to the surrounding area, and the urgency of rail transit construction is also increasing. In order to alleviate the funding predicament of rail transit construction, governments of various countries have vigorously called on foreign capital and private enterprises to enter the field of rail transit construction. With the continuous expansion of the world's cities and the increasing speed of industrial peripheral transfer, the demand for road safety products will be more and more vigorous.