Transportation is an important link to connect cities, and it is also an important channel for transportation and logistics for urban development. As the main driving force for urban development, transportation has a decisive impact on the flow of production factors and the development of the urban system.

German humanities and geographical scientist Rubic pointed out that "transportation is the force of cities." Throughout the history of the development of world cities, countless examples have proved that transportation plays an important role in urban development. Traffic and urban development have a deep relationship.

The development of urbanization is inseparable from urban transportation. The scope of cities depends on the radiation range of traffic roads. Transportation is an important condition for constituting a city and an important condition to promote urban development.

The development of transportation in a city is usually based on the city's transportation dependence needs. This development means that once a path that focuses on development, then this "road" will be continued in the future, it is difficult to re-plan.

In order to solve the problem of urban traffic congestion, more and more designs adopt three-dimensional traffic, such as overpasses and underpasses. This is especially true of overpasses, which are designed to divert vehicles in different directions through three-dimensional traffic.

This can not only improve traffic flow, but also ensure driving safety. In prosperous cities, the construction of overpasses has become the most popular mode of transportation.

The overpass is to separate the intersecting roads in vertical space, so that the traffic flow can realize the effect of non-interference on different elevations. Simply put, it is a way to avoid traffic congestion and ensure the orderly running of vehicles.

The overpass is both a bridge and a road, a perfect project that traverses the city's steel forest. It is like the blood vessels in the human body, overlapping and interweaving patchwork, is the crystallization of human imagination and wisdom.

Because with the continuous development of traffic roads, some big cities need to build overpasses to disperse the traffic flow. And overpass this method can not only facilitate the traffic, but also let the flow of traffic is well dispersed. So it plays a very important role as a transportation hub, but also saves people and cars passing time.

In addition, the shape of the overpass is chic and good-looking, which can beautify the city's environment to a certain extent. Because of the high cost of overpasses, they are usually only built on urban arterial roads or on expressways where traffic meets.

We all know the role of overpasses, mainly in order to ease the city's traffic jams. Therefore, in the construction of overpasses, we should choose to build in some cities with relatively large population density.

Most of the common ring type overpasses are three layers, and some can reach four or five layers. Therefore, the ring-shaped overpass can bring a strong landscape impact to our vision, and its cost is relatively expensive.

While enjoying the convenient services brought by the overpass, people have further improved the aesthetic requirements of transportation facilities. In recent years, while improving the functions of the overpass, we also pay attention to building buildings with a strong sense of art and cultural connotation.

The overpass echoes the surrounding buildings, forming a pleasing urban building landscape.