<abstract xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></abstract>

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.

Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka

Transport and Telecommunication Journal

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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...

Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka

Published Online: Feb 20, 2018

Page range: 10 - 20

DOI: https://doi.org/10.2478/ttj-2018-0002

Keywords
GPS, design criteria, reliability, AASHTO, passenger cars

© 2018 Transport and Telecommunication Institute

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka

Published Online: Feb 20, 2018

Page range: 10 - 20

DOI: https://doi.org/10.2478/ttj-2018-0002

KeywordsGPS, design criteria, reliability, AASHTO, passenger cars

© 2018 Transport and Telecommunication Institute

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
GPS, design criteria, reliability, AASHTO, passenger cars