The HELP/Crescent Project on the West Coast evaluated the applicability of four technologies for screening transponder-equipped vehicles. The technologies included automatic vehicle identification, weigh-in-motion, automatic vehicle classification, and integrated communications systems and databases. The benefits data are developed as a projection of experience from the project and from other databases rather than direct measurement by the project. Impact of hazardous material incidents could be reduced by $1.7 million annually per state. Estimates of reductions in tax evasion range from $0.5 to $1.8 million annually per state. Overweight loads could be reduced by 5 percent leading to a savings of $5.6 million annually. Operating costs of a weigh station could be reduced up to $169,000, with credentials checking adding $4.3-$8.6 million and automated safety inspections adding $156,000 to $781,000 in savings due to avoided accidents annually per state. A full implementation of services examined in the Crescent project would yield a benefit-to-cost ratio of 4.8 for a typical state government over a 20-year period. Less complete implementations range in benefit-to-cost ratio from no benefit up to 12:1 for the government.