TRB Special Report 303: Equity of Evolving Transportation Finance Mechanisms addresses the equity of alternatives to current transportation finance mechanisms, notably mechanisms based on tolling and road use metering (i.e., road pricing). The committee that developed the report concluded that broad generalizations about the fairness of high-occupancy toll lanes, cordon tolls, and other evolving mechanisms oversimplify the reality and are misleading. The fairness of a given type of finance mechanism depends on how it is structured, what transportation alternatives are offered to users, and which aspects of equity are deemed most important.