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Estimation of traffic delay due to u-turns at uncontrolled medians: case study in Phnom Penh, Cambodia

Lack of infrastructure capacity to the demand in mobility results in delays in traffic. U-turns restrict the movement of the opposing through-traffic during the maneuver, hence triggering delays. Significant delays can be observed, especially in high volume traffic, where U-turning is not restricted...

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Main Authors: Omarov, Maksat, Ismail, Syuhaida, Wan Mohd. Rani, Wan Nurul Mardiah, Durdyev, Serdar
Format: Article
Language:English
Published: MDPI 2022
Subjects:
Q Science (General)
Online Access:http://eprints.utm.my/104269/1/SyuhaidaIsmail2022_EstimationofTrafficDelayDuetoUTurns.pdf
http://eprints.utm.my/104269/
http://dx.doi.org/10.3390/su14010118
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spelling my.utm.1042692024-01-27T01:38:58Z http://eprints.utm.my/104269/ Estimation of traffic delay due to u-turns at uncontrolled medians: case study in Phnom Penh, Cambodia Omarov, Maksat Ismail, Syuhaida Wan Mohd. Rani, Wan Nurul Mardiah Durdyev, Serdar Q Science (General) Lack of infrastructure capacity to the demand in mobility results in delays in traffic. U-turns restrict the movement of the opposing through-traffic during the maneuver, hence triggering delays. Significant delays can be observed, especially in high volume traffic, where U-turning is not restricted. Hence, it is imperative to study the delays incurred by the U-turning vehicles to assess their impacts on traffic congestion. This study thus proposes a quantitative method to estimate the aggregate and average delay per vehicle caused by U-turns at uncontrolled medians of urban roads. Traffic data were collected at a corridor where vehicles were allowed to U-turn on a four-lane divided mixed traffic urban road in Phnom Penh, Cambodia. The delay in the opposing lane of traffic was calculated by analyzing the data using a novel analytical method; a derivative of the Webster’s delay model. The results reveal that the suggested technique evaluates the caused delay with good accuracy. Excessive traffic delay and about three seconds delay per vehicle in the through-traffic of the opposite lane align well with the experienced delay at the site. The method can be used to assess the delay at straight corridor sections where U-turns are not restricted, understand the causes of the delay, and develop control measures for improved traffic performance. MDPI 2022-01-01 Article PeerReviewed application/pdf en http://eprints.utm.my/104269/1/SyuhaidaIsmail2022_EstimationofTrafficDelayDuetoUTurns.pdf Omarov, Maksat and Ismail, Syuhaida and Wan Mohd. Rani, Wan Nurul Mardiah and Durdyev, Serdar (2022) Estimation of traffic delay due to u-turns at uncontrolled medians: case study in Phnom Penh, Cambodia. Sustainability, 14 (1). pp. 1-10. ISSN 2071-1050 http://dx.doi.org/10.3390/su14010118 DOI:10.3390/su14010118
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic Q Science (General)
spellingShingle Q Science (General)
Omarov, Maksat
Ismail, Syuhaida
Wan Mohd. Rani, Wan Nurul Mardiah
Durdyev, Serdar
Estimation of traffic delay due to u-turns at uncontrolled medians: case study in Phnom Penh, Cambodia
description Lack of infrastructure capacity to the demand in mobility results in delays in traffic. U-turns restrict the movement of the opposing through-traffic during the maneuver, hence triggering delays. Significant delays can be observed, especially in high volume traffic, where U-turning is not restricted. Hence, it is imperative to study the delays incurred by the U-turning vehicles to assess their impacts on traffic congestion. This study thus proposes a quantitative method to estimate the aggregate and average delay per vehicle caused by U-turns at uncontrolled medians of urban roads. Traffic data were collected at a corridor where vehicles were allowed to U-turn on a four-lane divided mixed traffic urban road in Phnom Penh, Cambodia. The delay in the opposing lane of traffic was calculated by analyzing the data using a novel analytical method; a derivative of the Webster’s delay model. The results reveal that the suggested technique evaluates the caused delay with good accuracy. Excessive traffic delay and about three seconds delay per vehicle in the through-traffic of the opposite lane align well with the experienced delay at the site. The method can be used to assess the delay at straight corridor sections where U-turns are not restricted, understand the causes of the delay, and develop control measures for improved traffic performance.
format Article
author Omarov, Maksat
Ismail, Syuhaida
Wan Mohd. Rani, Wan Nurul Mardiah
Durdyev, Serdar
author_facet Omarov, Maksat
Ismail, Syuhaida
Wan Mohd. Rani, Wan Nurul Mardiah
Durdyev, Serdar
author_sort Omarov, Maksat
title Estimation of traffic delay due to u-turns at uncontrolled medians: case study in Phnom Penh, Cambodia
title_short Estimation of traffic delay due to u-turns at uncontrolled medians: case study in Phnom Penh, Cambodia
title_full Estimation of traffic delay due to u-turns at uncontrolled medians: case study in Phnom Penh, Cambodia
title_fullStr Estimation of traffic delay due to u-turns at uncontrolled medians: case study in Phnom Penh, Cambodia
title_full_unstemmed Estimation of traffic delay due to u-turns at uncontrolled medians: case study in Phnom Penh, Cambodia
title_sort estimation of traffic delay due to u-turns at uncontrolled medians: case study in phnom penh, cambodia
publisher MDPI
publishDate 2022
url http://eprints.utm.my/104269/1/SyuhaidaIsmail2022_EstimationofTrafficDelayDuetoUTurns.pdf
http://eprints.utm.my/104269/
http://dx.doi.org/10.3390/su14010118
_version_ 1789424402918539264
score 13.211869

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