SIDRA 4.0 software status

The SIDRA (Signalized Intersection Design and Research Aid) package has been developed by the Australian Road Research Board (ARRB) as an aid for the design and evaluation of signalized intersections. With SIDRA Version 4.0 released recently, it has been extended to the analysis of roundabouts and other unsignalized intersections. This paper describes the features of SIDRA 4.0, as well as its availability and proposed futher development.