Traffic Lights Optimization with Measurements of Noise Levels

Acoustic measurements for assessing the intensity of the input traffic and for evaluation of queue lengths in front of the junctions are applied for the optimal control of traffic signals. The acoustic measurements are connected in a close loop form to the control process which adapts the optimal solutions according to the non-stationary traffic conditions. As an environmental parameter is introduced in an optimization problem, the control policy benefits both the optimal duration of the traffic lights and the decrease of the noise pollution in arterial traffic network.