Reasoning about Traffic Signals Controller for Intersection with Contraflow Lanes for Bus Rapid Transit Using Linear-time Temporal Logic

Computational and formal modeling have been used in traffic engineering, mainly to optimize the management of traffic signals and avoid collisions at intersections. One of the problems at the intersection involving the Bus Rapid Transit (BRT) is to reduce the utilization of BRT lanes by non-URT vehicles. This paper proposes a formal model of traffic control system for intersection with contraflow lanes for BRT. Based on the traffic regulations and pertinent data concerning typical intersection and contraflow lanes, we design a generic traffic signal controller for four-armed junction with specialized contraflow lanes for BRT. By using LTL formulas that describe a general traffic scenario and informal traffic specifications to check the compliance, we demonstrate that our proposed formal model complies to the traffic regulations and specifications.