Authorizes for a county to impose a mileage-based road usage charge. Provides for disposition of funds of county mileage-based road usage charge. Clarifies the disposition of funds of state mileage-based road usage charge. Repeals the maximum amount a driver will pay in a state mileage-based road usage charge on June 30, 2028. Establishes a default state mileage-based road usage charge rate when missing, incomplete, or incorrect odometer reading information that will prevent the state mileage-based road usage charge from being calculated. Appropriates funds. Effective 7/1/2050. (SD1)