The invention discloses an urban traffic jam identification method based on a
virus propagation theory. The method comprises the following steps: 1, establishing an urban traffic jam propagation model based on the SIS
virus propagation theory; 2, calculating the congestion proportion of the road section; and 3, recognizing the state of the road section based on the HHT model. Compared with the prior art, the method has the following positive effects: 1) simplicity: a simple
virus propagation process is used to describe space-time characteristics of congestion in an
urban road network during propagation, and the defect that a microscopic
traffic flow model needs great data and calculation capability can be overcome, and the defect that a
macroscopic traffic flow model cannot describe the propagation process can be overcome; and 2) accuracy: the HHT model is used for recognizing the traffic state of a road section and judging whether congestion happens or not, the
algorithm can capture the change rule of traffic data in time, all internal information of
original data is basically reserved, and balance between the data size and the information amount is achieved to a certain degree.