The Analysis about Wave of Traffic Flow and Linear Model of Traffic Event at the Expressway

In order to promote dissipation of traffic flow congestion or clog and reduce vehicle queue delay under the influence of traffic incidents,some intervention measures should be adopted in the upper reaches of the origin of traffic incidents.Based on hydrodynamic traffic flow wave theory,it is analyzed the interactive influence of traffic incidents and intervention measures on expressway traffic flow,established traffic flow wave speed model,These models or critical parameters provide theoretical basis for effectively determining schemes to solve traffic incidents and quickly eliminating traffic congestion or clog.