Sidra Intersection (previously called Sidra and aaSidra) is a software package used for intersection (junction) and network capacity, level of service and performance analysis by traffic design, operations and planning professionals. First released in 1984, it has been under continuous development in response to user feedback. A new major version with network modelling capability and new vehicle movement classes was released in April 2013.
Sidra Intersection is a micro-analytical traffic evaluation tool that employs lane-by-lane and vehicle drive cycle models. It can be used to compare alternative treatments of individual intersections and networks of intersections involving signalised intersections (fixed-time/pretimed and actuated), roundabouts (unsignalised), roundabouts with metering signals, fully signalised roundabouts, two-way stop and give-way (yield) sign control, all-way (4-way and 3-way) stop sign control, merging, single-point urban interchanges, traditional diamond and diverging diamond interchanges, basic freeway segments, signalised and unsignalised midblock crossings for pedestrians, and merging analysis.more