Abstract

This study compared the safety of road sections with various median barriers, namely: Step-shaped in-situ barriers, pre-cast concrete barriers and steel guardrails, as new barrier types (that satisfy the requirements of EN 1317 in Europe), and old NJ-shaped in-situ barriers. The study included 558 km of non-urban Israeli roads. Negative-binomial regression models were fitted for predicting crashes, and differences in crash expectancy were evaluated for various barrier types, while controlling for other road and traffic characteristics. On dual-carriageway roads, sections with Step-barriers showed a better safety level relative to those with NJ-barriers and, sometimes, to other barrier types. On motorways, the safety level of sections with Step-barriers was better or similar to that with NJ-barriers, with no difference compared to the pre-cast barriers, while sections with steel guardrails had a better safety level, particularly at traffic volumes over 40,000 vehicles. The economic evaluation showed benefits for replacing the old NJ-barrier by a Step-barrier, on dual-carriageway roads, and by steel barriers, on motorways.


Original document

The different versions of the original document can be found in:

https://zenodo.org/record/1441044 under the license http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
http://dx.doi.org/10.5281/zenodo.1441043 under the license http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode


DOIS: 10.5281/zenodo.1441043 10.5281/zenodo.1441044

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Published on 01/01/2018

Volume 2018, 2018
DOI: 10.5281/zenodo.1441043
Licence: Other

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