Road usage charges (RUCs), also known as mileage-based user fees, have moved rapidly from concept to practice in the United States. Oregon, Utah, Virginia, and Hawaii operate permanent programs. Additional states have completed pilots or enacted enabling legislation, and regional coalitions such as the Eastern Transportation Coalition have advanced multi-state testing. This activity is driven by long-term declines in per-vehicle fuel tax revenue, a consequence of rising fuel economy and evolving vehicle technologies. Despite the pace of rollouts, transportation agencies and researchers lack a consolidated, up-to-date synthesis of how operational programs differ across technology architecture, enrollment, rate structures, interoperability, implementation and administrative costs, and revenue outlook. This translational project will produce two deliverables: (1) a synthesis report comparing all active and developing U.S. RUC programs, with brief benchmarking against select international programs; and (2) an interactive website, hosted on a UC Davis subdomain, featuring a state-level status map with program summaries and forthcoming activity. The work builds directly on the PI's prior research on federal RUC administration, state-level implementation analyses, and integration with tolling systems. These products will give policymakers, practitioners, and the research community a single, current reference on which design choices have proven effective in operational programs and where implementation challenges have emerged.