SIDRA-2 implements the techniques described in the ARRB Research Report ARR No. 123 (Traffic Signals: Capacity and Timing Analysis). Although the fundamental principles and methods are the same, there are some important differences between ARR No. 123 and SIDRA-2. The most important is the lane-by-lane calculation of capacities and operating characteristics such as delay, number of stops and queue length. Lane-by-lane calculations allow for the use of different lost times, hence different effective green and red times, for different lanes, which improve the results for operating characteristics.
AKÇELIK, R. (1984). SIDRA-2 does it Lane by Lane. Proc. 12th ARRB Conf. 12(4), pp 137-149.