Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka
For a safe overtaking manoeuvre on two-lane highways, drivers need a sufficient sight distance along the roadway, but it depends on the traffic environment. To provide an adequate Passing Sight Distance (PSD), a number of models have been proposed since the initial model introduced by American Assoc...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Sciendo
2018-03-01
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| Series: | Transport and Telecommunication |
| Subjects: | |
| Online Access: | https://doi.org/10.2478/ttj-2018-0002 |
| _version_ | 1818343518635032576 |
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| author | Mampearachchi W. K. Masakorala S. R. |
| author_facet | Mampearachchi W. K. Masakorala S. R. |
| author_sort | Mampearachchi W. K. |
| collection | DOAJ |
| description | For a safe overtaking manoeuvre on two-lane highways, drivers need a sufficient sight distance along the roadway, but it depends on the traffic environment. To provide an adequate Passing Sight Distance (PSD), a number of models have been proposed since the initial model introduced by American Association of State Highways and Transport Officials (AASHTO) in 1954. It is a current design practice in Sri Lanka as well, however, not validated for local traffic conditions. This paper will present an alternative PSD model and an evaluation of AASHTO model for national highway design. Experiment was based on GPS data collection. In conclusion, PSD demand was satisfied by AASHTO PSD under mix traffic conditions, but not the safety concerns for speeds greater than 80 km/h, while alternative model successful for all speeds. |
| first_indexed | 2024-12-13T16:31:52Z |
| format | Article |
| id | doaj.art-06f3592433ff48be81664044ce9dd339 |
| institution | Directory Open Access Journal |
| issn | 1407-6179 |
| language | English |
| last_indexed | 2024-12-13T16:31:52Z |
| publishDate | 2018-03-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Transport and Telecommunication |
| spelling | doaj.art-06f3592433ff48be81664044ce9dd3392022-12-21T23:38:29ZengSciendoTransport and Telecommunication1407-61792018-03-01191102010.2478/ttj-2018-0002ttj-2018-0002Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri LankaMampearachchi W. K.0Masakorala S. R.1Professor of Civil Engineering, Department of Civil Engineering, University of Moratuwa, Sri LankaPostgraduate student, Department of Civil Engineering, University of Moratuwa, Sri LankaFor a safe overtaking manoeuvre on two-lane highways, drivers need a sufficient sight distance along the roadway, but it depends on the traffic environment. To provide an adequate Passing Sight Distance (PSD), a number of models have been proposed since the initial model introduced by American Association of State Highways and Transport Officials (AASHTO) in 1954. It is a current design practice in Sri Lanka as well, however, not validated for local traffic conditions. This paper will present an alternative PSD model and an evaluation of AASHTO model for national highway design. Experiment was based on GPS data collection. In conclusion, PSD demand was satisfied by AASHTO PSD under mix traffic conditions, but not the safety concerns for speeds greater than 80 km/h, while alternative model successful for all speeds.https://doi.org/10.2478/ttj-2018-0002gpsdesign criteriareliabilityaashtopassenger cars |
| spellingShingle | Mampearachchi W. K. Masakorala S. R. Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka Transport and Telecommunication gps design criteria reliability aashto passenger cars |
| title | Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka |
| title_full | Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka |
| title_fullStr | Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka |
| title_full_unstemmed | Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka |
| title_short | Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka |
| title_sort | analytical model for passing sight distance design criteria of two lane roads in sri lanka |
| topic | gps design criteria reliability aashto passenger cars |
| url | https://doi.org/10.2478/ttj-2018-0002 |
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