Priority-Based Adaptive Traffic Signal Control System for Smart Cities

The traffic signal control system has paramount importance in managing the traffic congestion at road intersections. It allows smooth traffic flow through the road intersections. Keeping in view to increase the traffic flow through the intersections, this paper proposes an adaptive traffic signal which can be used as a prototype for smart cities. The proposed traffic signal system will act according to the context of the traffic status in the intersections. The phase selection is adaptive in nature in the proposed system and phase will be selected based on the lane priority. The lane priority is calculated based on traffic parameters: vehicle density and waiting time. Also, the green signal time of the system of each cycle is dynamic. The amount of green time a lane will get depends on the vehicle density of that lane. The proposed system has the ability to handle the emergency vehicle approaching the intersection by shifting to emergency mode from regular mode. The simulation result shows that the average percentage of traffic flow has been increased by 31.05% in the proposed adaptive traffic signal control system as compared with the fixed time traffic signal system. It also performs comparatively well in both the traffic situations: balanced vehicle density and unbalanced vehicle density across the roads in the intersection. © 2022, The Author(s), under exclusive licence to Springer Nature Singapore Pte Ltd.