Study On Urban Bicycle Traffic Accessibility Based On Travelers' Physiological And Psychological Perception

In the process of rapid urbanization,the development of motorized traffic has destroyed the original space suitable for slow-moving traffic such as walking and bicycle.Reducing the space of slow-moving traffic to meet the demand of motorized traffic has led to the aggravation of traffic congestion and exhaust pollution.This over-reliance on car travel mode urgently needs to be solved by building a reasonable bicycle traffic network and improving the bicycle traffic system,which reflects the core principle of urbanization of "people-oriented,sharing equity".The basic purpose of urban traffic is to achieve the movement of "people and things",rather than the movement of motor vehicles.Accessibility is characterized by the difficulty and convenience of travelers' movement,therefore this thesis took the improvement of bicycle traffic accessibility as the starting point.This thesis reviewed the research status of bicycle traffic in domestic and abroad,and analysed the research contents and relevant theories of traffic accessibility.Bicycle travelers are not only different from motor vehicles in terms of travel modes and occupied resources,but also different in their physiological and psychological perceptions at the micro level.Through the design of urban bicycle-riding experiment,this thesis explored the change rule of travelers' psychological perception,such as mood state,psychological load,heart rate,physical energy consumption and other physiological perception under different types of bicycle lanes.By using statistical methods such as variance analysis,correlation analysis and linear regression,the intrinsic relationship between traffic environment and physiological and psychological perception was obtained.This thesis used physiological perception and psychological perception as intermediate variables to correlate travel proportion and riding distance.Negative exponential function was used to fit the physiological perception impedance function based on physical consumption and the psychological perception impedance function based on POMS index.Simultaneously,the concept of effective length was proposed,and the effective length of different types of bicycle lanes were calibrated by the impedance function obtained.This thesis summarized and combed the most widely used accessibility models,emphatically analysed and modified the cumulative-opportunity model,and took the opportunity scale within a given travel threshold as the index of bicycle network accessibility.Based on the effective length,this thesis assigned different types of bicycle lanes,and obtained the bicycle network accessibility model based on physiological and psychological perception.The accessibility model was applied to a specific research area through the ArcGIS network analysis module,and the accessibility indicators of 1 km,2 km and 3 km commuter travel circle were obtained.Research demonstrated that bicycle network layout,traveler perception and land use patterns are all important factors affecting accessibility.Perceived accessibility model can be applied to build different levels of commuter life circles of the city,and provids a basis for accessibility-oriented bicycle network planning.