Research On Influencing Factors And Optimization Methods Of Traffic Lines In Underground Parking Lots Of Commercial Complex

With the economic development,the number of cars is increasing,and the number of vehicles entering and leaving the underground parking lot of the commercial complex is increasing,resulting in serious traffic conflicts at the entrance and exit of the vehicle and inside the parking lot,resulting in waste of traffic resources and increased travel costs.Therefore,in order to improve this situation,this paper studies the influencing factors and optimization methods of the urban commercial complex underground parking lot’s traffic flow,hoping to improve the entrance and exit of the commercial complex underground parking lot and the internal traffic conditions to a certain extent.The main work of the paper is as follows:First,by summarizing the research status of domestic and international commercial complex parking lots,the parking characteristics,entrances and exits,and internal traffic operation characteristics of commercial complex parking lots are analyzed in detail.AHP was used to analyze the influencing factors of the traffic flow of the underground parking lot in the commercial complex.In this paper,a total of 28 influencing factors of the traffic flow were selected,and a hierarchical structure model of the influencing factors of the traffic flow was constructed.Relative weights determine the length of entrances and exits,the distance between entrances and exits,the traffic organization form and traffic volume at entrances and exits as the main influencing factors.Secondly,starting from the length of entrances and exits,the distance between entrances and exits,and the traffic organization form at the entrances and exits,the optimization method for the traffic flow of parking lots is proposed:(1)Starting from the queuing theory,combined with the lineof-sight triangle method,respectively The length of the entrance and exit of the complex parking lot is optimized;(2)The calculation model of the distance between the same direction entrance and the entrance and exit is established,and the design and optimization of the entrance and exit distance are optimized;(3)Combining the entrance and exit to connect the one-way traffic organization and the two-way traffic organization In this case,the traffic conflicts under the two forms of right-in and right-out and left-in and left-out at the entrance and exit are analyzed respectively,and then a method for optimizing the traffic flow at the entrance and exit and in the parking lot is proposed.The organization and channelization have been optimized based on the parking lot situation.Then,the average traffic delay,average queuing length and the number of traffic conflicts were selected as the simulation experiment evaluation indexes and the VISSIM simulation evaluation model was established.The simulation was carried out in combination with the traffic organization form at the entrance and exit under different traffic volume.The simulation results were compared and analyzed.The right and left entrances and exits and the left and right exits are suitable for traffic.Finally,taking the parking lot of a commercial complex in Chongqing as an example,the traffic flow lines at the entrance and exit and inside the parking lot are optimized,and the traffic flow lines before and after optimization are simulated and analyzed,and the fuzzy composite based on the entropy weight method is applied.The matter-element comprehensive evaluation model conducted a comprehensive evaluation,and it was concluded that the comprehensive evaluation value after optimization was 2.68,which was better than the evaluation value before optimization of 2.03,which verified the effectiveness of the optimization scheme.The research results of this paper have certain practical significance in alleviating the parking congestion of urban commercial complexes,connecting road congestion,and improving traffic efficiency.