This report provides a summary of evaluation results of Washington’s participation in the Road Usage Charge Pilot Program (RUCPP). The RUCPP was a trial of various approaches and technologies for motorists in the states of Washington, Oregon, and Nevada to measure and report mileage as the basis for a per-mile road usage charge (RUC). Beginning in November 2012, selected participants signed agreements, selected plans, and adopted in-vehicle devices to measure their road usage for the succeeding months. Washington participants received monthly invoices indicating their road usage and associated charges, less taxes paid on fuel as estimated by the system; however, they did not actually make any payments. The pilot was formally completed on January 31, 2013. This report represents the findings of the pilot test by the evaluation team under the direction of the Washington State Department of Transportation (WSDOT).