Effectiveness Analysis Of Setting Up Two Lane Climbing Lane Considering Overtaking Behavior Choice

In the mountainous regions of China,the road line shape is affected by the terrain and landforms,and the climbing road section is formed.The load-carrying vehicles on the climbing road section have a slower speed due to poor climbing performance.The speed difference between large-sized vehicles and small-sized vehicles on the climbing sections seriously affects the safety and efficiency of the sections.Especially on two-lane highways,the overtaking behavior needs to occupy the opposite lane,making the safety and efficiency problems on the climbing sections even more serious.The setting of climbing lanes can,to a certain extent,change the adverse effects brought by the mixed traffic of trucks.However,under what circumstances the two-lane highway sets the climbing lanes,the standards given by the Chinese regulations are not detailed enough.From the perspectives of safety and efficiency,this paper demonstrates the effectiveness of the setting of climbing lanes for two-lane highways by comparing the changes in the rate of change in overtaking collision rates and the improvement of traffic capacity in the case of climbing lanes with or without climbing lanes.The setting of the lane gives a more reasonable basis.In this paper,six-axle heavy-duty trucks are selected as two-lane vehicles to be mixed into the dominant models.Based on the field survey data analysis,the basic models and parameters of the vehicle speeds and car overtaking behaviors on the uphill section are determined;the ratio of unit overtaking collision ratio changes and the ability to travel are selected.Raise the ratio as a safety and efficiency evaluation indicator for the effectiveness of road section climbing lanes,consider that overtaking behavior is a key factor affecting the safety and efficiency of the uphill section,and through the questionnaire survey and follow-up behavior survey to obtain the driver's oversight distance on the uphill section.Overtaking selection behavior on unfavorable over-sighted roads and overtaking lines,a logit model was used to construct a decision model for overtaking selection,and a cellular automata was used to simulate the situation of climbing lanes in two lanes.The overtaking behavior and other characteristics have improved the basic rules of cellular automata,changed the driver's selection decision model into a cell model for the driver's overtaking selection rule,and verified the overtaking selection through the comparison of simulation and actual overtaking times.Reliability of decision models;analysis of masters that affect safety and efficiency Factors,459 kinds of combinatorial simulation schemes under the influence factors of design speed,slope length,slope,traffic volume,vehicle mix-in rate,and unfavorable ratio of overtaking line-of-sight are determined,and safety and efficiency evaluation index values under each combination scheme are obtained.The regression relationships between the six influencing factors and the two evaluation indexes were determined,and the safety and efficiency evaluation indicators were graded using the normal distribution method.Finally,the tomographic analysis was used to synthesize the two evaluation indicators to effectively set the climbing lanes.Sexuality is evaluated,and the evaluation flow of the validity of a two-lane climbing lane is given.Based on this flow,an example analysis is made and a climbing lane setting suggestion is given.