Cover Image

Effect of rainfall intensity variability on highway capacity

Traffic flow rate variability on road networks occurs when traffic decelerates on approach to a perturbation or accelerates away from it. This may be due to rainfall as well as physical bottlenecks. This study examines the effect of rainfall on a highway straight section operating under free flow co...

Full description

Saved in:
Bibliographic Details
Main Authors: Alhassan, Hashim Mohammed, Ben Edigbe, Johnnie
Format: Article
Published: EuroJournals Publishing, Inc. 2011
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utm.my/id/eprint/28961/
https://www.europeanjournalofscientificresearch.com/ejsr_issues.html
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.utm.28961
record_format eprints
spelling my.utm.289612019-03-05T02:03:28Z http://eprints.utm.my/id/eprint/28961/ Effect of rainfall intensity variability on highway capacity Alhassan, Hashim Mohammed Ben Edigbe, Johnnie TA Engineering (General). Civil engineering (General) Traffic flow rate variability on road networks occurs when traffic decelerates on approach to a perturbation or accelerates away from it. This may be due to rainfall as well as physical bottlenecks. This study examines the effect of rainfall on a highway straight section operating under free flow conditions and to evaluate the effect of changes in rainfall intensity on the capacity of the section. Data for this study was collected from a two-way interurban arterial J5 near Pengkalan Raja in Johor Bahru State of Malaysia. The observation site was 750m away from a rain gauge station. A pneumatic loop detector was installed for 30 days during which 31 rainfall events were recorded. The data was filtered to obtain traffic flow information for both dry and wet operating conditions and these were analysed to see the effect of the rainfall. Rainfall intensity less than 2.5mm/hr. resulted in 8.14% capacity loss. Rainfall intensity between 2.5mm/hr. and 10mm/hr. substantially reduced the capacity by 50.30%. Under heavy rain condition (10mm/hr. and 50mm/hr.) 31.09% capacity loss was recorded. Roadways that lose 30% or more of their capacity in dry weather will generate instabilities that will persist for a long time. In adverse weather, the traffic state is unpredictable and could lead to similar situations as in dry weather. Resources could be placed from this point on to manage the resulting flow scenarios. On highway facilities where flow rates are higher and close to the capacity region, these effects could be more pronounced. EuroJournals Publishing, Inc. 2011-01 Article PeerReviewed Alhassan, Hashim Mohammed and Ben Edigbe, Johnnie (2011) Effect of rainfall intensity variability on highway capacity. European Journal of Scientific Research, 49 (1). pp. 18-27. ISSN 1450-216X https://www.europeanjournalofscientificresearch.com/ejsr_issues.html
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/
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Alhassan, Hashim Mohammed
Ben Edigbe, Johnnie
Effect of rainfall intensity variability on highway capacity
description Traffic flow rate variability on road networks occurs when traffic decelerates on approach to a perturbation or accelerates away from it. This may be due to rainfall as well as physical bottlenecks. This study examines the effect of rainfall on a highway straight section operating under free flow conditions and to evaluate the effect of changes in rainfall intensity on the capacity of the section. Data for this study was collected from a two-way interurban arterial J5 near Pengkalan Raja in Johor Bahru State of Malaysia. The observation site was 750m away from a rain gauge station. A pneumatic loop detector was installed for 30 days during which 31 rainfall events were recorded. The data was filtered to obtain traffic flow information for both dry and wet operating conditions and these were analysed to see the effect of the rainfall. Rainfall intensity less than 2.5mm/hr. resulted in 8.14% capacity loss. Rainfall intensity between 2.5mm/hr. and 10mm/hr. substantially reduced the capacity by 50.30%. Under heavy rain condition (10mm/hr. and 50mm/hr.) 31.09% capacity loss was recorded. Roadways that lose 30% or more of their capacity in dry weather will generate instabilities that will persist for a long time. In adverse weather, the traffic state is unpredictable and could lead to similar situations as in dry weather. Resources could be placed from this point on to manage the resulting flow scenarios. On highway facilities where flow rates are higher and close to the capacity region, these effects could be more pronounced.
format Article
author Alhassan, Hashim Mohammed
Ben Edigbe, Johnnie
author_facet Alhassan, Hashim Mohammed
Ben Edigbe, Johnnie
author_sort Alhassan, Hashim Mohammed
title Effect of rainfall intensity variability on highway capacity
title_short Effect of rainfall intensity variability on highway capacity
title_full Effect of rainfall intensity variability on highway capacity
title_fullStr Effect of rainfall intensity variability on highway capacity
title_full_unstemmed Effect of rainfall intensity variability on highway capacity
title_sort effect of rainfall intensity variability on highway capacity
publisher EuroJournals Publishing, Inc.
publishDate 2011
url http://eprints.utm.my/id/eprint/28961/
https://www.europeanjournalofscientificresearch.com/ejsr_issues.html
_version_ 1643648203078238208
score 13.211869

Similar Items