A comprehensive evaluation scheme of the traffic congestion

A congestion evaluation strategy which contained multi-index real-time evaluation and non-real-time evaluation was proposed in order to tackle the problem that the convention strategy can not evaluate traffic congestion effectively, because of the single index, incomprehensive type. In the real-time evaluation of this scheme, if data was missing seriously, the traveling speed should be taken as the only index to evaluate the traffic congestion, else the traveling speed, saturation and delay should be taken as the index to evaluate the traffic congestion by using running state classification. In the non-real-time evaluation, the traveling speed throughout one day should be taken as the independent variable to establish Gaussian mixture distribution model and the evaluation result could be get by analyzing this model. Simulation results indicate that the real-time evaluation and the non-real-time evaluation can analyze the traffic flow objectively and evaluate the traffic congestion effectively.