Comparing Common Control Group treatment and signal coordination of intersections with separate controllers

Aerial photograph of road

Abstract

Common Control Group is a SIDRA INTERSECTION software term used for a group of signalised intersections controlled by a single signal controller. This is relevant to the modelling of signalised paired (closely-spaced) intersections and interchanges such as staggered T intersections, freeway interchanges, intersections with median area controlled by signals, fully-signalised roundabouts as well as alternative intersection and interchange types such as continuous flow intersection and diverging diamond interchange. The signal timing analysis for a Common Control Group is carried out using a single-phase sequence that incorporates all movements at the facility. This differs from the signal timing method for a network of separate intersections with signal coordination operating under a common cycle time. This presentation explains the reason for difference in network performances resulting from the two methods of signal control using a simple example including results from the SIDRA INTERSECTION software.

Reference

AKÇELIK, R. and BESLEY, M. (2018). Comparing Common Control Group treatment and signal coordination of intersections with separate controllers. Presentation at the 28th International ARRB Conference, Brisbane, Apr 2018.