This study attempts to assess the intervention effectiveness of a new traffic regulation on red-light running (RLR) based on RLR records collected in Harbin, China. Descriptive statistics and a chi-square test were applied to investigate the variation patterns regarding the number of RLR and RLR vehicles by vehicle type and RLR level before and after the implementation of a new traffic regulation, respectively. Analysis results show that a new traffic regulation has varying influences on six types of RLR vehicle at four RLR levels. Specifically, the number of RLR cars and trucks at four RLR levels first decrease and then increase after performing the new regulation. Such regulation reduces the number of other types of RLR vehicles at different RLR levels. The findings from this research are helpful to adjust the layout and design of red light cameras and further revise traffic regulations for specific vehicles such as cars and trucks.
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