An Ensemble of Pressure Adaptive Signal Control Algorithms for Urban Traffic Networks

This thesis revamps how traffic signals respond to real-time congestion on busy urban roads. It develops Pressure Adaptive Signal Control ALgorithm (PASCAL), a novel max-pressure control method that can flexibly serve the most urgent traffic movements by calculating pressures exerted while still giving fair service to all directions. Two extensions are then introduced: Coord-PASCAL, which creates smoother green waves along corridors, and Transit-PASCAL, which gives smarter priority to buses at the intersections using factors like delay, headway, and passenger occupancy. Simulation on a real Brisbane corridor shows these methods reduce congestion, queues, and delays, especially under heavy traffic.