Spatiotemporal Distribution of Traffic Violations in a Medium-Sized City Luzhou

Exploring the spatial and temporal distribution of traffic violations is vital to road safety management. This study investigated the traffic violations of illegal parking and disobeying the guide lane, which are the most observed in a middle-sized city Luzhou. The temporal distributions between the traffic violations are compared in time of day, day of week, and month of year. The underlying spatial dependency and cluster of the violations are investigated by global Moran’s I, local Moran’s I, and kernel density. Results show that the frequency of illegal parking is remarkably higher in the period ranging from September to December, weekdays, morning, and afternoon. However, the violations of disobeying the guide lane are more frequently observed in the first-half year and daytime. Both two types of violation are positively correlated in space. Moreover, the density of illegal parking is higher in the upper area of the city where commercial and residential zone are common, while disobeying the guide lane is mostly found in several intersections which are close to the freeway exit. The possible explanations of the spatial and temporal distributions are discussed.