Transit's 'B/3' performance based specification for structural design and construction of flexible unbound pavements, including chip seal surfacing, was introduced as a provisional document in 2000, to foster the use of marginal and non-conforming materials that give similar performance to standard basecourse and sub-base materials. Another objective is to preserve prime quality aggregates, so that road construction is achieved in a sustainable manner that mitigates any adverse environmental effects. The paper includes the respective views of the contractor and Transit as to the experiences gained thus far with the two projects described in the paper, and the benefits of a performance based specification for structural design and construction of flexible unbound pavements. It is intended to provide an insight into the process so that other road authorities might also adopt performance-based specifications for road construction, to allow best use of local resource to achieve the required pavement performance. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E208431.
Samenvatting