Research On Traffic Characteristics And Traffic Design Of Urban Community Motor Vehicles

Under the background of mechanization,urban communities are seriously impacted,which lead to parkins chaos,fire escape space cannot be guaranteed and residents' activity space is invaded by parking,personal safety is under the threat of motor vehicles,and the functions of communities'public space shows a trend of single parking.For the basic difficulties faced by communities,the status quo of community motor vehicle traffic represented by cars is summarized and its characteristics are analyzed and the road traffic design is studied in this paper,which have important reference value for the transformation of communities.The paper takes the east area of Huimin village,Leshan village and such communities in Jinan as research object,investigating the rules of vehicles running and parking in intersections and road segments,on the basis of which,summarizing the problems of motor vehicles running in community,targeted analyzing the features of space requirements that vehicles turn in the intersection,traffic capacity of small intersection,and the demand of vehicles passing each other on road segment.According to the analysis of vehicle traffic characteristics,the paper provides design schemes of traffic organization and space for road in communities aiming to reduce the influences of vehicles running and parking on communitiesThe main research results of this paper are as follows:(1)the characteristics of space demand of vehicles turning at intersections.For the intersections with different road widths and angles,a method for calculating the minimum turning radius of kerb stones of intersections meeting different sizes of vehicles turning is presented.The current intersection of communities can meet the needs of small cars to turn,but can't meet the needs of fire truck and other large vehicles to turn.(2)the characteristics of capacity of small-sized intersections in communities.Taking the intersection of cross and T in community as an example,the capacity of the intersection where only one vehicle is allowed to pass is analyzed.It is found that although the capacity of small-sized intersections is very low,it can basically meet the vehicle'passing demand.(3)The demand of vehicles passing each other on road segment,The process of vehicles passing each other on road segment is analyzed,deriving a method for calculating the demand of vehicles passing each other on road segment related to the length,flow and speed of the road segment.It was found that,the demand of vehicles passing each other on road segment is very low in communities.(4)Traffic organization design of intersections and road segment.For the intersection,a traffic organization design method based on the capacity of intersection and proportion of the vehicles colliding in the opposite direction is proposed.And for road segment,a traffic organization design method which combines single-double passing and turn-out lane is proposed.(5)Space design of intersections and road segment.For intersection,a space design scheme which can satisfy the turning of cars and fire trucks at the same time and avoid parking is proposed.For road segment,the suggested value of the width of the motor vehicle lane which can meet the requirement of no random parking is put forward.The innovation points of this paper are as follows:(1)put forward the calculation method of the minimum turning radius of kerb stone at the intersection that meets the needs of vehicles of different sizes;(2)the capacity of the intersection where only one vehicle is allowed to pass is analyzed;(3)The demand of vehicles passing each other on road segment is analyzed;(4)the schemes traffic organization and space design for community roads are proposed.