The environmental impact of traffic flows in urban networks is an increasingly serious problem. The possibilties are investigated ofmodifying route choice of traffic in urban networks to meet the standards for noise annoyance and the emission of pollutants. Therefore, for each link of the network an environmental capacity is defined, being the minimum capacity of a link resulting from the selected environmental standards. The maximum flow on a link is defined by the minimum of the environmental capacity and the free flow capacity. Byassigning the traffic to the network using the equilibrium assignment technique, a desired pattern of flows is obtained that meets the environmental standards as far as possible. The model is applied to the network of the town of ede-bennekom, the netherlands. This paperappears in transportation research record no. 1312, Energy and environmental issues 1991.
Abstract