Open AccessA method for estimating pedestrian critical gap using microsimulation
Author(s) -
Talyson Pereira Bandeira,
Lisel Expósito Martín,
Manoel Mendonça de Castro Neto
Publication year - 2021
Publication title -
transportes
Language(s) - English
Resource type - Journals
eISSN - 2237-1346
pISSN - 1415-7713
DOI - 10.14295/transportes.v29i1.2240
Subject(s) - pedestrian , microsimulation , vissim , pedestrian crossing , estimation , engineering , computer science , statistics , simulation , transport engineering , mathematics , systems engineering
Estimating critical gap is crucial for modelling pedestrian level of service at crossings. Critical gap modelling becomes more challenging in signalized crossings because the proportion of pedestrians seeking gaps during red is usually unknown. Besides, the willingness – or lack of it – to cross during red signal indication varies by pedestrian and local characteristics, which makes gap acceptance modelling even more challenging. The main objective of this study is to propose a method for estimating pedestrian critical gap at signalized crossings using Vissim. The method considers that all pedestrians seek for gaps on red, and the critical gap parameter is calibrated for each pedestrian type having delay as calibration target. The results showed MAPE values of 2% and 9% for the two studied crossings. This method was compared to three existing methods of critical gap estimation. The results showed that the proposed method yielded the best estimations of delay, followed by the HCM’s.