Title :
A Linear Time and Space Algorithm for Optimal Traffic-Signal Duration at an Intersection
Author :
Samra, S. ; El-Mahdy, A. ; Wada, Y.
Author_Institution :
Dept. of Comput. Sci. & Eng., Egypt-Japan Univ. of Sci. & Technol., Alexandria, Egypt
Abstract :
Finding an optimal solution for traffic-signal control duration is a computationally intensive task. It is typically O(T3) in time and O(T2) in space, where T is the length of the control interval in discrete-time steps. In this paper, we propose a linear time and space algorithm for the traffic-signal control problem. The algorithm provides an efficient dynamic programming formulation of the state space that prunes nonoptimal states early on. This paper proves the correctness of the algorithm and provides an initial experimental validation. This paper also conducts a simulation study comparing with other typical control methods. The results show significant improvement in the average waiting time metric with respect to all other methods.
Keywords :
computational complexity; dynamic programming; road traffic control; average waiting time metric; dynamic programming; linear time and space algorithm; nonoptimal states; optimal traffic-signal control duration problem; state space; Aerospace electronics; Dynamic programming; Heuristic algorithms; Optimization; Prediction algorithms; Real-time systems; Vehicles; Dynamic programming; optimization; traffic-signal control;
Journal_Title :
Intelligent Transportation Systems, IEEE Transactions on
DOI :
10.1109/TITS.2014.2336657