Optimization of signal control parameter at intersection with wave theory

In order to solve the problems in signal timing that the traffic flow is discrete in China and it's hard to describe the rule by easy model, the paper analyzes the wave characteristics of traffic in virtue of wave theory and traffic data of fifteen minutes, and points out that the traffic has consistency on portrait and otherness on transversary at signalled intersection, furthermore, when the ratio of V/C of signal intersection is increasing, the traffic wave coefficient is reduced. Based on traffic wave characteristics at signal intersection, combining the ideas of adaptive control and inductive control, the paper brings forward a new optimizing arithmetic of signal control parameter. The arithmetic has good adaptability aiming at the randomicity of traffic flow arriving intersection by practical appliance.