Discussion on urban road traffic congestion algorithm for automatically determining

摘要

Compared with expressway, most of the traffic flow in urban road network can be denoted as interrupted traffic flow. Based on the currently employed equipment for traffic flow collection and traffic signal control in urban roads, different types of traffic flow in urban roads is analyzed with the traffic flow arrival/departure model in transportation engineering. Mathematical models complying with traffic flow changes are utilized to match the traffic flow in both entry and exit road blocks, thus enabling the automatic detection of traffic incident. This algorithm serves as a measure for the automatic judgment of urban road congestion and the expansion utility of intelligent transportation facilities in urban areas.