Abstract
The effective measure of the disorder in a traffic flow has a great significance to improve the traffic condition and reduce the negative impact on environment caused by traffic jams. Since the traffic one-dimension entropy cannot reflect the spatial distribution characteristics, this paper proposed and defined traffic two-dimension entropy that reflected the statistical information of vehicle types and spatial distribution. In order to reflect the actual condition of a road, the weight of space around a vehicle was used in the simulation. The simulation results showed that: traffic two-dimension entropy to quantify and describe the disorder in traffic flow is reasonable and effective.
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