Investigating the influence of conflicting flow’s composition on critical gap under heterogeneous traffic conditions

The choice to accept or reject an available gap at unsignalized intersections depends on several factors that include driver and vehicle characteristics, intersection geometry, weather conditions, etc. Although drivers in heterogeneous traffic conditions accept shorter gaps than their counterparts i...

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Autores principales:	Mithun Mohan, Satish Chandra
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Critical gap Unsignalized intersection Driver behaviour Heterogeneous traffic Occupancy time method Transportation engineering TA1001-1280
Acceso en línea:	https://doaj.org/article/53d5a07bc1f646d685f1fcb30a0d86f8
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spelling	oai:doaj.org-article:53d5a07bc1f646d685f1fcb30a0d86f82021-11-30T04:15:29ZInvestigating the influence of conflicting flow’s composition on critical gap under heterogeneous traffic conditions2046-043010.1016/j.ijtst.2021.01.004https://doaj.org/article/53d5a07bc1f646d685f1fcb30a0d86f82021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2046043021000058https://doaj.org/toc/2046-0430The choice to accept or reject an available gap at unsignalized intersections depends on several factors that include driver and vehicle characteristics, intersection geometry, weather conditions, etc. Although drivers in heterogeneous traffic conditions accept shorter gaps than their counterparts in developed countries, they are reluctant to accept the same gap offered by a large-sized vehicle instead of a smaller vehicle. This influence of traffic stream’s composition on the critical gap is not well-established. The present research attempts to quantify this influence by realizing its importance, especially under heterogeneous traffic conditions. Data were collected from six unsignalized intersections located in different parts of India through videography. Details about gaps and lags which were accepted and rejected, types of vehicles involved in the gap acceptance process, and the amount of conflicting traffic faced by each of the turning vehicles were extracted from the recorded videos. Critical gaps for different vehicle types making right-turns at each of the intersections were estimated based on Occupancy Time Method. Further, a non-linear regression revealed that the estimated critical gaps vary logarithmically with the percentage of large-sized vehicles in the conflicting flows. Based on these relationships, the base values of the critical gap and the adjustment for the proportion of large-sized vehicles in conflicting flows are estimated for turning movements at unsignalized intersections in heterogeneous traffic conditions. These relationships will be useful in assessing the capacity of unsignalized intersections of developing countries.Mithun MohanSatish ChandraElsevierarticleCritical gapUnsignalized intersectionDriver behaviourHeterogeneous trafficOccupancy time methodTransportation engineeringTA1001-1280ENInternational Journal of Transportation Science and Technology, Vol 10, Iss 4, Pp 393-401 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Critical gap Unsignalized intersection Driver behaviour Heterogeneous traffic Occupancy time method Transportation engineering TA1001-1280
spellingShingle	Critical gap Unsignalized intersection Driver behaviour Heterogeneous traffic Occupancy time method Transportation engineering TA1001-1280 Mithun Mohan Satish Chandra Investigating the influence of conflicting flow’s composition on critical gap under heterogeneous traffic conditions
description	The choice to accept or reject an available gap at unsignalized intersections depends on several factors that include driver and vehicle characteristics, intersection geometry, weather conditions, etc. Although drivers in heterogeneous traffic conditions accept shorter gaps than their counterparts in developed countries, they are reluctant to accept the same gap offered by a large-sized vehicle instead of a smaller vehicle. This influence of traffic stream’s composition on the critical gap is not well-established. The present research attempts to quantify this influence by realizing its importance, especially under heterogeneous traffic conditions. Data were collected from six unsignalized intersections located in different parts of India through videography. Details about gaps and lags which were accepted and rejected, types of vehicles involved in the gap acceptance process, and the amount of conflicting traffic faced by each of the turning vehicles were extracted from the recorded videos. Critical gaps for different vehicle types making right-turns at each of the intersections were estimated based on Occupancy Time Method. Further, a non-linear regression revealed that the estimated critical gaps vary logarithmically with the percentage of large-sized vehicles in the conflicting flows. Based on these relationships, the base values of the critical gap and the adjustment for the proportion of large-sized vehicles in conflicting flows are estimated for turning movements at unsignalized intersections in heterogeneous traffic conditions. These relationships will be useful in assessing the capacity of unsignalized intersections of developing countries.
format	article
author	Mithun Mohan Satish Chandra
author_facet	Mithun Mohan Satish Chandra
author_sort	Mithun Mohan
title	Investigating the influence of conflicting flow’s composition on critical gap under heterogeneous traffic conditions
title_short	Investigating the influence of conflicting flow’s composition on critical gap under heterogeneous traffic conditions
title_full	Investigating the influence of conflicting flow’s composition on critical gap under heterogeneous traffic conditions
title_fullStr	Investigating the influence of conflicting flow’s composition on critical gap under heterogeneous traffic conditions
title_full_unstemmed	Investigating the influence of conflicting flow’s composition on critical gap under heterogeneous traffic conditions
title_sort	investigating the influence of conflicting flow’s composition on critical gap under heterogeneous traffic conditions
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/53d5a07bc1f646d685f1fcb30a0d86f8
work_keys_str_mv	AT mithunmohan investigatingtheinfluenceofconflictingflowscompositiononcriticalgapunderheterogeneoustrafficconditions AT satishchandra investigatingtheinfluenceofconflictingflowscompositiononcriticalgapunderheterogeneoustrafficconditions
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Investigating the influence of conflicting flow’s composition on critical gap under heterogeneous traffic conditions

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