There is no water under what bridge?

There is no water under the overpass. There is no water under the overpass, because it is a viaduct, which relieves the pressure on urban roads. The biggest function of the overpass is to eliminate the traffic conflict at the road intersection through spatial isolation, so that the through vehicles at the two intersections are unimpeded. To put it bluntly, the plane road is three-dimensional and can accommodate more traffic.

Because the traffic on the overpass can be said to be simple or complicated, each road has a different division of labor, but as long as you go your own way, there is no problem.

Other conditions of overpass.

Overpasses span existing lines and are divided into separated and overpass types. The former only ensures the independent passage of vehicles on and off the line; The latter can make the upper and lower vehicles pass each other, build complex roundabout ramps on the plane and elevation, and occupy a lot of land. To reduce noise, prestressed concrete bridges are often used.

Crossing the existing line from underground, it consists of bridge holes, approach roads and ancillary structures. Underground pipelines need to be removed during construction, and the ancillary works are large, which is far less economical than the construction of overpass bridges. In addition, the design should pay attention to the requirements of clearance, ventilation, lighting, drainage and anti-icing (cold areas).