sidra intersection was first developed over 20 years at the australian road research board (1979–1999) as a technology transfer tool to enable practitioners to use major research results without delay, and then at akcelik and associates since 2000. akcelik and associates conducts its own research s well as using the latest research results which become available internationally including the highway capacity manual. thus sidra intersection includes high technical content based on extensive scientific research. a formal "effectiveness audit" of related research carried out by an independent panel formed by the australian road research board in 1993 noted ""the panel rated the technical merit of the research as very high and concluded that it has established international and professional reputations in the fields of traffic signal analysis, roundabout analysis, and energy and emissions modelling"".