Bridge barriers: towards national standards

The purpose of this paper is to describe the details of tested barrier systems which have formed the basis for the design of recognizable multiple performance level barriers as well as outline barrier options for the higher performance levels. The paper also presents results of recent research investigations carried out to develop and rationalize prototype barrier systems in accordance with the new AS 5100 Standard multiple performance level requirements. The proposed prototype barriers subject to Austroads approval in accordance with AS 5100 Standard requirements may in time be accredited for national use. Bridge Barriers have been the subject of ongoing investigations as emphasis on road safety has intensified. The implementation of recognizable cost-effective barriers is important for road safety. VicRoads has since October 1997 implemented guidelines for the design and performance selection of appropriate barriers relevant to site risk which in part have formed the basis of the AS 5100 Bridge Design Standard provisions. The AS 5100 Standard provides requirements for multiple performance level barriers, including: selection, design and acceptance of crashworthy barriers.