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AuthorIryo-Asano M.
AuthorAlhajyaseen W.K.M.
Available date2019-05-19T10:09:47Z
Publication Date2017
Publication NameAccident Analysis and Prevention
ISSN14575
URIhttp://dx.doi.org/10.1016/j.aap.2017.08.028
URIhttp://hdl.handle.net/10576/11588
AbstractPedestrian safety is one of the most challenging issues in road networks. Understanding how pedestrians maneuver across an intersection is the key to applying countermeasures against traffic crashes. It is known that the behaviors of pedestrians at signalized crosswalks are significantly different from those in ordinary walking spaces, and they are highly influenced by signal indication, potential conflicts with vehicles, and intersection geometries. One of the most important characteristics of pedestrian behavior at crosswalks is the possible sudden speed change while crossing. Such sudden behavioral change may not be expected by conflicting vehicles, which may lead to hazardous situations. This study aims to quantitatively model the sudden speed changes of pedestrians as they cross signalized crosswalks under uncongested conditions. Pedestrian speed profiles are collected from empirical data and speed change events are extracted assuming that the speed profiles are stepwise functions. The occurrence of speed change events is described by a discrete choice model as a function of the necessary walking speed to complete crossing before the red interval ends, current speed, and the presence of turning vehicles in the conflict area. The amount of speed change before and after the event is modeled using regression analysis. A Monte Carlo simulation is applied for the entire speed profile of the pedestrians. The results show that the model can represent the pedestrian travel time distribution more accurately than the constant speed model. � 2017 Elsevier Ltd
SponsorQatar University, University of Tokyo
Languageen
PublisherElsevier Ltd
dc.source Scopus
SubjectCrossing time
SubjectPedestrian crossing behavior
SubjectPedestrian-vehicle conflicts
SubjectSignalized crosswalks
SubjectSpeed change
TitleModeling pedestrian crossing speed profiles considering speed change behavior for the safety assessment of signalized intersections
TypeArticle
Pagination332 - 342
Volume Number108


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