An optimization model for planning road networks that considers traffic noise impact

Abstract

To reduce potential noise emissions, an optimization model for planning a road network that considers traffic noise impact is proposed. First, the urban traffic noise prediction method is constructed with the road structure as a constraint. Then, the travel time function is built based on the traffic flow model. Furthermore, the road network optimization model is presented based on the minimum network noise cost under different traffic flow states. The results of road structure optimization show the following: 1) Traffic noise cost increases but travel delay increases as travel coefficients increase; 2) The road traffic noise cost of the smaller design speed is lower; 3) The optimal road structures with various travel coefficients are recommended for distinct optimal objects. 4) The difference between the upper and lower limits of traffic noise pollution under different road structures is within 9 dB. This research can provide a reference for noise control.