Signalized Intersection Pedestrian Crossing Design Speed and Elderly Pedestrian Proportion Relationship Study

This study investigates the relationship between pedestrian crossing speed and the elderly pedestrian proportion under different pedestrian flow conditions. The micro simulation model was used to obtain the crossing speed and elderly pedestrian proportion data considering different pedestrian level of services (PLOS). The pedestrian free-flow speed and accelerations for the old people, the young and middle-aged people were collected at three signalized intersections in Chongqing, China to calibrate the micro-simulation model. The relationship between the elderly pedestrian proportion and the pedestrian crossing design speed was established by the principal component analysis and the regression model. The results indicate that the design speed of pedestrian crossing is 0.94 m∙s-1 when the elderly pedestrian accounts for 21% to 41% of the pedestrian flow. The design speed of pedestrian crossing is recommended to be 0.86 m∙s-1 when there are more than 41% of pedestrians are elderly people, which meets the needs of the elderly crossing at signalized intersections. Copyright © 2021 by Science Press.