"TRB's National Cooperative Highway Research Program (NCHRP) Report 689: Costs of Alternative Revenue-Generation Systems presents a framework for analysis of the direct costs incurred in generating the revenues that support federal-aid and state highway construction, operations, and maintenance and uses that framework to estimate unit costs for fuel taxes, tolling, vehicle-miles of travel fees, and cordon pricing schemes."--pub. desc.

TRB¿s National Cooperative Highway Research Program (NCHRP) Report 623: Identifying and Quantifying Rates of State Motor Fuel Tax Evasion explores a methodological approach to examine and reliably quantify state motor fuel tax evasion rates and support agency efforts to reduce differences between total fuel tax liability and actual tax collections.