Pedestrian gap acceptance behavior becomes more critical at un-signalized, unmarked midblock crossings due to complex interactions of pedestrians with moving vehicles. The critical gap is an essential parameter in exploring the gap acceptance behavior. This paper analyzes the gap acceptance behavior of pedestrians crossing an un-signalized mid-block with no marked crosswalk through critical gaps. Existing literature has many methods for estimating the critical gaps, such as Clearing time, Greenshield’s, Raff’s, and Harder’s methods. The present study aims to estimate and compare the critical gaps for pedestrians crossing individually and in a group at the un-signalized midblock section for morning and evening peak times. The study also explores the perceived risk of crossing pedestrians at the un-signalized mid-block section under study. Accordingly, the data were recorded using a video-graphic survey at an un-signalized unmarked midblock crossing in Delhi, India. Further, the Dartfish software was used to extract vehicular gaps with an accuracy of 20 ms (0.020 s), resulting in 3126 lags/gaps data of 635 pedestrians. Subsequently, the critical gaps were estimated and compared using (a) Clearing time, (b) Greenshield’s, (c) Raff’s, and (d) Harder’s methods. The study found that critical gaps using Greenshield’s, Raff’s, and Harder’s methods are lower than the Clearing time method. The findings suggested that the Clearing time method is the most appropriate for estimating critical gaps in Indian traffic conditions. The study results would help urban planners and policymakers evaluate safety performances and design pedestrian crossing facilities accordingly.
Analysis of Pedestrians’ Gap Acceptance Behavior Through Critical Gaps at Un-Signalized Unmarked Midblock Crossing in Delhi
Lecture Notes in Civil Engineering
Urban Mobility India ; 2023 ; New Delhi, India October 27, 2023 - October 29, 2023
2024-12-15
10 pages
Article/Chapter (Book)
Electronic Resource
English
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