Sufficient and valid data regarding traveler behavior is a necessary input to the assessment of the environmental impacts of congestion pricing. At present, there are little data and no comprehensive assessment of how and why travelers actually respond to congestion pricing situations in the United States. In addition, travel and emissions models require improved data that will enable the models to identify the kinds of changes that result from road pricing. The purpose of this task order is to conduct preparatory work to support upcoming U.S. Department of Transportation evaluation efforts. This preparatory work includes the development of a synthesis report on the environmental impacts of congestion pricing in the United States as well in as other countries. The synthesis report will ultimately be used to inform both the design and the content of U.S. Department of Transportation evaluations.
The projects objectives are to:
(1) Document experiences in estimating environmental impacts due to congestion pricing implementations.
(2) Recommend an evaluation framework for congestion pricing projects.