Abstract
This report provides detailed information on the various methods employed by transportation agencies to estimate user costs. The advantages and disadvantages of each are reported. Information on the various components of user costs: time related, vehicle operating, and environmental costs, is also included. In addition, the study reports on the various mitigation strategies available to agencies to reduce user costs. Information is also provided on how user costs and mitigation strategies have been applied to evaluate different alternatives, and how uncertainties, political considerations, and quality control contribute to the decision making process. (A)