Study On Traffic Noise Characteristics And Prediction Model Of Urban Bus Stops

The rapid development of public transport not only brings convenience to people's travel,but also brings many environmental pollution problems.Especially near bus stops,the frequent acceleration and deceleration of large-scale public transport vehicles in and out of the bus platform aggravates the traffic noise pollution of the bus platform,which has a serious impact on the life,work and rest of the residents around the bus platform.It is of great significance to study the characteristics and influencing factors of traffic noise at bus stops for the control of traffic noise and noise pollution at bus stops.This paper takes the traffic noise of urban bus stops as the research object,analyzes the traffic noise intensity and frequency characteristics of bus stops by means of on-site monitoring,data collection and data analysis and analyzes the traffic noise level distribution rule by using the cross table method.The ordered multi classification Logistic model of the traffic noise level of the two types of bus stops,including the straight-line type and the harbor type,is established respectively,and the prediction model of the traffic noise near the continuous bus stops are established respectively.On this basis,the traffic noise control measures of bus stops are proposed.The achievements of this paper are as follows:(1)Based on the analysis of cross table,this paper expounds the relationship between the influence factors of two types of bus stops and the distribution of traffic noise level,and also expounds the statistical power test of chi-square test.It is concluded that the noise of bus stops is related to the number of bus,the stability of driver's operation and the density of traffic flow.(2)The ordered multi classification Logistic model of the traffic noise level of the two types of bus stops,including the straight-line type and the harbor type,is established respectively.For the first type of straight-line bus stops,the main influencing factors of the traffic noise level of bus stops are the number of outbound buses,whether the driver operates smoothly,whether there is voice prompt,and the density of the same direction and opposite direction traffic flow.For the second type of harbor bus stops,whether the driver operates smoothly,whether there is voice prompt,the density of traffic flow in the same direction and opposite direction,and the location of the bus platform will affect the noise level of the bus stops.(3)The average equivalent sound level near the bus stop is calculated accurately by the method of segment superposition,and the correctness of the model is verified by the field survey data.(4)VISSIM simulation is used to optimize the selection of bus platform location and platform form from the perspective of noise control,and other traffic noise control measures of bus platform are studied from the aspects of suppressing the generation of noise source,blocking the transmission path of noise and protecting the sounder.In this paper,the noise intensity and frequency characteristics of bus stops,the factors affecting the traffic noise of bus stops are studied,and the instantaneous and continuous traffic noise model of bus stops is established,which is of great significance to the control of traffic noise at and near bus stops.