Accuracy of Optimum Road Pricing considering Local Emissions of Road Traffic Network

Relieving urban traffic congestion with road pricing has been attracting considerable attention of analysts and policymakers for many years and recently for local traffic air-pollution problems. In this paper, an optimum road pricing model is proposed considering local traffic emissions and illustrated with hypothetical network. Davidson time-flow function is considered and vehicle speed-emission factor relationship is introduced. For convexity, original curve has been modified and optimum pricings using modified curve are compared with the optimum pricings using original curve with descriptive approach with UE model. It is found that the pricings using modified curve are quite close to original curve at different speeds and can be recommended in general networks.