HighlightsConverting junctions to roundabouts improves road safety.Fatal accidents are reduced by 60–60%.Injury accidents are reduced by 35–45%.Effects on property-damage-only accidents are ambiguous.

    AbstractThis paper presents a meta-analysis of the road safety effects of converting junctions to roundabouts. 44 studies containing a total of 154 estimates of effect were included. Based on a meta-regression analysis, converting junctions to roundabouts is associated with a reduction of fatal accidents of about 65% and a reduction of injury accidents of about 40%. The mean effect on property-damage-only accidents is ambiguous. Summary estimates of effect are robust for fatal and injury accidents, but vary depending on the model of meta-analysis and the treatment of outlying data points for property-damage-only accidents. A trim-and-fill analysis suggests a weak tendency for publication bias, with modest influence on summary estimates of effect. It is concluded that roundabouts are very effective in reducing traffic fatalities.


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    Title :

    Road safety effects of roundabouts: A meta-analysis


    Contributors:
    Elvik, Rune (author)

    Published in:

    Publication date :

    2016-12-25


    Size :

    8 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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