Influence Of Engineering Construction On Traffic Accidents From The Spatio-Temporal Perspective

Road traffic safety is a serious challenge for the whole world.Urban engineering construction can lead to an increase in the number of construction transport vehicles and make the road environment more complex,thereby increasing the risk of accidents.However,there has been no research to verify the correlation between urban engineering construction and traffic accidents.To investigate the influence of urban construction on traffic accidents,this thesis adopted 12152 traffic accidents and 119 engineering construction projects for correlation analysis.First,considering five types of vehicles(passenger cars,large passenger cars,light trucks,heavy trucks,and non-motor vehicles)of accidents,the spatial autocorrelation test of accidents is carried out by using spatial econometric.Then to further evaluate and analyze the spatial regression model,the optimal model is selected to analyze the spatial influence of engineering construction projects on the accidents.Then,a quantitative assessment of the spatial influence of engineering construction projects on accidents in the spatial unit and surrounding spatial units is conducted based on the number of projects,project construction duration,and project building area for different land use types.In order to achieve the purpose of improving the urban road traffic condition,the thesis puts forward some suggestions on improving the road traffic safety.The main research findings of this thesis are as follows:(1)The spatial distribution of traffic accidents in Licheng District is not random.Under the spatial weight matrix of a "Distance Band" with a bandwidth of 1.2km,areas with a high number of accidents have a high number of accidents in their surrounding areas,and the spatial dependence is most significant.The spatial dependence of different types of vehicle accidents is ranked from high to low as follows: non-motor vehicle accidents,passenger car accidents,light truck accidents,heavy truck accidents,and large passenger car accidents.The "high-high" type of high-value aggregation areas are mainly located in the northwest of Licheng District,while the "low-low" type of low-value aggregation areas are mainly distributed in the north and south.(2)There is a significant positive spatial correlation between accidents and construction projects in Licheng District.Areas with a high number of accidents have a higher number of construction projects in their surrounding areas.The spatial correlation of accidents with construction projects is ranked from high to low as follows: passenger car accidents,non-motor vehicle accidents,heavy truck accidents,large passenger car accidents,and light truck accidents.In the four quarters,the correlation between passenger car accidents and construction projects is highest in the “Q2”,as is the case with accidents involving light trucks.However,large passenger car accidents and heavy truck accidents are highest in the “Q3”,while non-motor vehicle accidents are highest in the “Q4”.In the four time periods,the spatial correlation between passenger car accidents and construction projects is highest in the "Afternoon",while that of large passenger car,light truck,and non-motor vehicle accidents are highest in the "Morning".And the spatial correlation between heavy truck accidents and construction projects is highest in the "Early Morning".The "high-high" type of high-value aggregation areas are mainly located in the northwest of Licheng District,and the high-value aggregation area for heavy truck accidents and construction projects tends to shift eastward compared to other types of vehicle accidents.(3)The impact of construction projects on the spatial unit and adjacent spatial units varies greatly depending on the time period.Variables such as the number of projects,floor area for comprehensive land use,residential land use,and commercial land use have a greater negative impact on accidents during the "Early Morning" and "Evening",while the floor area for road and traffic facilities has a greater negative impact during the "Morning" and "Afternoon".The floor area for road and traffic facilities has the most significant spatial impact on accidents,with an average increase of 0.035% in traffic accidents for every 1% increase in floor area for road and traffic facilities in the spatial unit.The next most significant factors are floor area for residential land use,commercial land use,and comprehensive land use projects,with a 1%increase in building area leading to a 0.026%,0.021%,and 0.013% increase in accidents,respectively.Floor area for industrial land use and public service facilities has almost no impact on road traffic safety in the spatial unit.