Extent of Entry Capacity Loss at Roundabouts Caused by Rainy Conditions
Entry capacity loss at multilane roundabouts caused by rainfall was investigated. Traffic and rainfall data were collected continuously for eight weeks at selected sites in South Africa and Malaysia. Three classes of rainfall (light, moderate, and heavy) were used. Both linear and exponential techni...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/4192323 |
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| author | J. Ben-Edigbe A. H. Pakshir S. O. Ibijola |
| author_facet | J. Ben-Edigbe A. H. Pakshir S. O. Ibijola |
| author_sort | J. Ben-Edigbe |
| collection | DOAJ |
| description | Entry capacity loss at multilane roundabouts caused by rainfall was investigated. Traffic and rainfall data were collected continuously for eight weeks at selected sites in South Africa and Malaysia. Three classes of rainfall (light, moderate, and heavy) were used. Both linear and exponential techniques were used to model the relationship between entry and circulating traffic flows. Correction factor for entry angle and radius was introduced in the linear model equations to allow for variations in geometric data. Correction factor is not required for the exponential model technique. Notwithstanding, both techniques predicted that entry capacity loss would result from rainfalls irrespective of their intensity. Results show that light rainfall may cause about 5% entry and circulating capacity loss, moderate rainfall may cause about 12% capacity loss, and heavy rainfall may cause about 17% capacity loss. This paper proposed further studies into the effect of two circulating lanes rather than one on entry capacity at roundabouts. |
| format | Article |
| id | doaj-art-fca8d7e0664346b39405dc10f1cd2d11 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-fca8d7e0664346b39405dc10f1cd2d112025-02-03T01:01:58ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/41923234192323Extent of Entry Capacity Loss at Roundabouts Caused by Rainy ConditionsJ. Ben-Edigbe0A. H. Pakshir1S. O. Ibijola2School of Engineering, University of KwaZulu-Natal, Durban, South AfricaDepartment of Civil Engineering, Lenjan Branch, Islamic Azad University, Isfahan, IranSchool of Engineering, University of KwaZulu-Natal, Durban, South AfricaEntry capacity loss at multilane roundabouts caused by rainfall was investigated. Traffic and rainfall data were collected continuously for eight weeks at selected sites in South Africa and Malaysia. Three classes of rainfall (light, moderate, and heavy) were used. Both linear and exponential techniques were used to model the relationship between entry and circulating traffic flows. Correction factor for entry angle and radius was introduced in the linear model equations to allow for variations in geometric data. Correction factor is not required for the exponential model technique. Notwithstanding, both techniques predicted that entry capacity loss would result from rainfalls irrespective of their intensity. Results show that light rainfall may cause about 5% entry and circulating capacity loss, moderate rainfall may cause about 12% capacity loss, and heavy rainfall may cause about 17% capacity loss. This paper proposed further studies into the effect of two circulating lanes rather than one on entry capacity at roundabouts.http://dx.doi.org/10.1155/2018/4192323 |
| spellingShingle | J. Ben-Edigbe A. H. Pakshir S. O. Ibijola Extent of Entry Capacity Loss at Roundabouts Caused by Rainy Conditions Advances in Civil Engineering |
| title | Extent of Entry Capacity Loss at Roundabouts Caused by Rainy Conditions |
| title_full | Extent of Entry Capacity Loss at Roundabouts Caused by Rainy Conditions |
| title_fullStr | Extent of Entry Capacity Loss at Roundabouts Caused by Rainy Conditions |
| title_full_unstemmed | Extent of Entry Capacity Loss at Roundabouts Caused by Rainy Conditions |
| title_short | Extent of Entry Capacity Loss at Roundabouts Caused by Rainy Conditions |
| title_sort | extent of entry capacity loss at roundabouts caused by rainy conditions |
| url | http://dx.doi.org/10.1155/2018/4192323 |
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