Moreover, unfit vehicle safety status (87.61%), overload (75.81%) and commercial vehicle (76.54%) exhibit a higher-than-average traffic violation proportion. Environment and other factors such as street light condition, weather condition, visibility level and whether it was a weekend also significantly relate to traffic violations. In particular, no street lighting at night (75.53%), good weather (75.02%), bad visibility (77.39%) and weekends (75.17%) are found to exhibit a higher traffic violation proportion.