Overhead opening bridge

The technological project adopts in the invention for solving problem is that viaduct bridge with ”Ï-shaped road surface on crossroad. At all corners of bridge, lifting plates of road surface are assembled so that vehicles pass on the viaduct bridge when stop signal emits by red light in traffic and vehicles pass under the bridge by opening active plates of road surface when running signal emits by green light. After running in transverse direction, the running is started. The active bridge surface is divided into two segments. One segment connecting to the road surface is putting segment downward, which is put on the road surface smoothly so that vehicles running downward can passes on it without hinder. The other segment is the segment connecting viaduct bridge. The segment is lifted up when vehicles runs to the bridge. The length of road surface plate of the segment connecting the viaduct bridge is longer than the front segment and the center of length is set on the support. The height under the support is constrained by appropriate running height and two ends of the support can be lifted. When it is red light, the upper end of lifter is connected with the road surface of Viaduct Bridge and the lower end is connected with the active plate of road surface so that vehicles can run on the viaduct bridge directly. When it is green light, the road surface plate is flat so that vehicles run under the bridge.