Micro Simulation Study Of Non Motorized Vehicles Considering Retrograde Effects

Non motorized cyclists generate a significant demand for retrograde travel in order to save time and energy.When retrograde non motorized vehicles enter the non motorized lane,they will have complex interaction behavior with forward moving non motorized vehicles.Therefore,in order to ensure the riding efficiency,comfort,and safety of forward non motorized vehicles,as well as to provide basis and suggestions for the management of reverse non motorized vehicles and the design of reverse non motorized vehicle riding facilities.Firstly,it is necessary to study the riding characteristics of non motorized vehicles under the influence of retrograde non motorized vehicles,especially the mutual avoidance characteristics,and construct a bidirectional non motorized vehicle avoidance model as an analysis tool to propose applicable conditions and suggestions for the planning of retrograde non motorized vehicle lanes.This article takes non motorized vehicle lanes under hard isolation conditions as the research scenario,and takes forward and backward non motorized vehicles riding inside them as the research objects.The specific research work is as follows:(1)Analysis and Research on Bidirectional Non motorized Vehicle Riding CharacteristicsBased on video surveys,data extraction is conducted to analyze the characteristics of bidirectional non motorized vehicle riding and avoidance phenomena.The avoidance process of non motorized vehicles is divided into three stages: the opposite driving stage,the deviation avoidance stage,and the end avoidance stage.The avoidance behavior during the deviation avoidance stage is divided into three categories: comfortable avoidance,general avoidance,and emergency avoidance.An analysis was conducted on the micro characteristics of non motorized vehicle riding avoidance ratio,avoidance distance,lateral deviation,speed change,deviation angle,and lateral spacing in response to these three types of behaviors.(2)Establishing a bidirectional micro motion model for non motorized vehiclesBased on the social force model,the behavior of forward and backward non motorized vehicles in the process of bidirectional non motorized vehicle interaction is modeled.The model mainly depicts the riding behavior on both sides of backward non motorized vehicles and the avoidance behavior of bidirectional non motorized vehicles.The detailed characterization of cycling behavior in the three stages analyzed earlier and the modeling of three types of avoidance behavior have improved the accuracy and authenticity of the model in depicting bidirectional non motorized vehicle interaction behavior.Subsequently,the model parameters were calibrated,including general avoidance angle,general avoidance force intensity and range,emergency avoidance force intensity and range,and continuous flow boundary force.Based on Python,the model simulation was implemented.Finally,the effectiveness and superiority of the model were verified through four parts: offset trajectory map verification,avoidance occurrence frequency verification,offset amount verification,and velocity density basic map verification.Provided tool support for subsequent research.(3)Research on the Design of Right of Way for Retrograde Non motorized Vehicles.Using the previous model and simulation platform design experiments for simulation,the relationship between the arrival and avoidance times of retrograde non motorized vehicles,the impact of different flow rates of retrograde non motorized vehicles on the speed of forward non motorized vehicles,and the location of retrograde non motorized vehicle lanes were studied,Provide scientific basis for relevant policy formulation and facility design.