| During the "Thirteenth Five-Year Plan" period,our country’s highway maintenance management has achieved outstanding results,which have provided strong support for the rapid development of my country’s economy,but my country’s existing maintenance management system still has weak links.As of the end of 2020,my country’s highway mileage has reached 150,000 kilometers,and the national highway maintenance mileage has increased from 3,688,300 kilometers at the end of 2009(accounting for 95.53% of the total road mileage)to 4,953,100 kilometers at the end of 2019(accounting for98.17% of the total road mileage),my country’s road maintenance demand has a significant growth trend;in addition,my country’s long-term "reconstruction and light maintenance" concept has led to a very weak road maintenance foundation and difficult maintenance tasks.Strengthening road maintenance has become a top priority for my country’s road development.Expressway maintenance operations occupy part of the road resources.The original dynamic traffic system will cause certain interference.The traffic vehicles are forced to slow down,change lanes,and the road conflict points increase.There are huge safety hazards;maintenance operations often lack unified and reasonable traffic.Signs and safety protection facilities are set up to be standardized,and the organization and management of maintenance operations are more difficult and safety risks are increased.Based on the psychological differences of drivers of different personalities,the paper introduces tension parameters that characterize the psychological load of drivers,and aims at the operating behavior data and psychological state data of drivers of different personalities passing through the highway maintenance construction section,and establishes based on driver tension.The cellular automata simulation model of the highway maintenance construction section with a high degree of qualitative analysis can qualitatively analyze the indicators that affect the traffic flow stability of the highway maintenance construction section,so as to provide a certain theoretical basis for exploring the reasonable layout of the warning signs of the maintenance construction section.Provide protection for the safety of maintenance workers and drivers.(1)Analyze the purpose and significance of the research on the safety of highway maintenance and construction,and summarize the research on the traffic safety characteristics of highway construction areas,the driving behavior of the drivers in the construction section,and the safety improvement measures of the maintenance and construction sections by domestic and foreign scholars,indicating that there are existing theoretical research deficiencies and research necessity.(2)Analyze the types of highway maintenance construction and the basic characteristics of the highway maintenance construction sections,elaborate on the traffic state of the highway maintenance construction sections,analyze the driver’s visual characteristics and psychological stress evaluation indicators,and discuss the cellular automata model Principles and development trends,clarify the construction criteria of cellular automata simulation model,and provide a basic theoretical basis for the subsequent cellular automata model of highway maintenance construction section and analysis of the traffic flow characteristics of the construction section.(3)Use a driving simulator to build a simulation experiment scene of highway maintenance construction sections to obtain vehicle state data and driver tension psychological state data on maintenance construction sections.Due to differences in the driver’s personality,the behavior data of the maintenance construction sections are different.Relevant information on the actual driver’s personality ratio on the expressway,and construct a personality-differentiated driver behavior model.(4)Construct a cellular automata simulation model for maintenance construction sections based on mixed traffic flow of drivers with different personalities,select the change rate of the distance between vehicles and the speed standard deviation as the evaluation indicators to measure the safety of highway maintenance construction sections,and analyze the differences through simulation data.The effect of lane changing position and speed limit sign spacing-position on the stability of traffic flow under different road service levels.(5)According to the speed limit sign spacing-position control strategy and the lane change position control strategy in advance,the stability of traffic flow can be improved to a certain extent.The comprehensive safety evaluation index is selected to measure the effect of the control strategy,and the best conditions under different road service levels are proposed.It is better to change lanes in advance and the best speed limit sign spacing-position to provide a theoretical reference for the arrangement of warning signs for the closed inner lane of the highway maintenance construction section. |
