Reliability-Based Analysis of Sight Distance Modelling for Traffic Safety
Sight distance is of the utmost importance for traffic safety. The consideration of three-dimensional (3D) available sight distance (ASD) in geometric design has been supported by several researchers. However, existing ASD estimation methods are two-dimensional (2D) in nature, which do not evaluate...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Journal of Advanced Transportation |
| Online Access: | http://dx.doi.org/10.1155/2017/5612849 |
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| _version_ | 1832567821772521472 |
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| author | César de Santos-Berbel Mohamed Essa Tarek Sayed María Castro |
| author_facet | César de Santos-Berbel Mohamed Essa Tarek Sayed María Castro |
| author_sort | César de Santos-Berbel |
| collection | DOAJ |
| description | Sight distance is of the utmost importance for traffic safety. The consideration of three-dimensional (3D) available sight distance (ASD) in geometric design has been supported by several researchers. However, existing ASD estimation methods are two-dimensional (2D) in nature, which do not evaluate varying visibility conditions. This paper compares different methodologies of modelling the ASD. The ASD of 402 horizontal curves, located in twelve in-service two-lane rural highways, was analyzed. Three ASD estimation methods were used which include a 2D method and two different 3D methods. The ASD results obtained through 2D and 3D methodologies are compared. Also, the different conditions of the existing roadside features or geometric elements, under which the 3D ASD estimation is important, were identified. Next, reliability theory is utilized to evaluate the risk level (probability of noncompliance, Pnc) associated with limited sight distance for each ASD modelling method. The results of the comparison emphasized the importance of considering the 3D modelled sight distance when evaluating the associated risk either in highway design or during the service life. In addition, the results indicated that the ASD modelling approach can have a significant impact on the estimation of the safety of highway design. |
| format | Article |
| id | doaj-art-b03044433eb84497ad920968b711ce83 |
| institution | Kabale University |
| issn | 0197-6729 2042-3195 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Advanced Transportation |
| spelling | doaj-art-b03044433eb84497ad920968b711ce832025-02-03T01:00:27ZengWileyJournal of Advanced Transportation0197-67292042-31952017-01-01201710.1155/2017/56128495612849Reliability-Based Analysis of Sight Distance Modelling for Traffic SafetyCésar de Santos-Berbel0Mohamed Essa1Tarek Sayed2María Castro3Departamento de Ingeniería Civil: Transporte y Territorio, Technical University of Madrid (UPM), Madrid, SpainDepartment of Civil Engineering, University of British Columbia, 6250 Applied Science Lane, Vancouver, BC, V6T 1Z4, CanadaDepartment of Civil Engineering, University of British Columbia, 6250 Applied Science Lane, Vancouver, BC, V6T 1Z4, CanadaDepartamento de Ingeniería Civil: Transporte y Territorio, Technical University of Madrid (UPM), Madrid, SpainSight distance is of the utmost importance for traffic safety. The consideration of three-dimensional (3D) available sight distance (ASD) in geometric design has been supported by several researchers. However, existing ASD estimation methods are two-dimensional (2D) in nature, which do not evaluate varying visibility conditions. This paper compares different methodologies of modelling the ASD. The ASD of 402 horizontal curves, located in twelve in-service two-lane rural highways, was analyzed. Three ASD estimation methods were used which include a 2D method and two different 3D methods. The ASD results obtained through 2D and 3D methodologies are compared. Also, the different conditions of the existing roadside features or geometric elements, under which the 3D ASD estimation is important, were identified. Next, reliability theory is utilized to evaluate the risk level (probability of noncompliance, Pnc) associated with limited sight distance for each ASD modelling method. The results of the comparison emphasized the importance of considering the 3D modelled sight distance when evaluating the associated risk either in highway design or during the service life. In addition, the results indicated that the ASD modelling approach can have a significant impact on the estimation of the safety of highway design.http://dx.doi.org/10.1155/2017/5612849 |
| spellingShingle | César de Santos-Berbel Mohamed Essa Tarek Sayed María Castro Reliability-Based Analysis of Sight Distance Modelling for Traffic Safety Journal of Advanced Transportation |
| title | Reliability-Based Analysis of Sight Distance Modelling for Traffic Safety |
| title_full | Reliability-Based Analysis of Sight Distance Modelling for Traffic Safety |
| title_fullStr | Reliability-Based Analysis of Sight Distance Modelling for Traffic Safety |
| title_full_unstemmed | Reliability-Based Analysis of Sight Distance Modelling for Traffic Safety |
| title_short | Reliability-Based Analysis of Sight Distance Modelling for Traffic Safety |
| title_sort | reliability based analysis of sight distance modelling for traffic safety |
| url | http://dx.doi.org/10.1155/2017/5612849 |
| work_keys_str_mv | AT cesardesantosberbel reliabilitybasedanalysisofsightdistancemodellingfortrafficsafety AT mohamedessa reliabilitybasedanalysisofsightdistancemodellingfortrafficsafety AT tareksayed reliabilitybasedanalysisofsightdistancemodellingfortrafficsafety AT mariacastro reliabilitybasedanalysisofsightdistancemodellingfortrafficsafety |