Pedestrian Level of Service at Signalized Intersections in China Using Contingent Field Survey and Pedestrian Crossing Video Simulation

摘要

As China motorizes, the number of motorized vehicles and non-or semi-motorizedvehicle conflicts is increasing. Pedestrians are the most vulnerable users of signalizedintersections in urban areas and context sensitive methods are required to improve theirexperience.This study proposes a reliable and convenient investigation method to estimatepedestrian level of service (LOS) based on Chinese traffic environments and Chinesepedestrians’ perceptions. A modified method of pedestrian simulation was developed,Pedestrian Crossing Video Simulation (PCVS) and the reliability and validity of the methodwas corroborated with Contingent Field Survey (CFS) analysis.The LOS estimation methods were conducted on 12 selected crosswalks. Experimentalresults showed that PCVS has the characteristics of immersion and reality based on consistentperceptions of pedestrian LOS between the two methodsFactors influencing pedestrian LOS were investigated using two approaches, Pearsoncorrelation analysis and stepwise regression analysis. The regression analysis (R~2=0.65)revealed intuitive signs and magnitudes of significant variables that influence LOS; increasesin delay, turning traffic, mixed two-wheeler volume, and pedestrian delay have negativeimpacts to LOS. Pedestrian volume and the presence of a refuge island enabling a two-stepcrossing both improve pedestrian LOS.