<jats: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.

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https://doaj.org/toc/1407-6179 under the license cc-by-nc-nd
https://academic.microsoft.com/#/detail/2797431625 under the license http://creativecommons.org/licenses/by-nc-nd/3.0
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Published on 01/01/2018

Volume 2018, 2018
DOI: 10.2478/ttj-2018-0002
Licence: Other

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