As motor fuel taxes continue to decline due to factors like fuel efficiency and the rise of electric vehicles, several U.S. states are exploring alternative approaches, such as charging motorists based on the distance they travel rather than the amount of fuel they consume. Oregon, Utah, and Virginia are already generating revenue through road usage charging programs, with Hawaii set to join soon. While some states have implemented temporary measures like additional taxes on electric vehicles or tolling systems, road usage charges are gaining attention and support. These programs aim to address the widening gap between gas tax proceeds and transportation budgets, which could reach $67 billion by 2050 due to fuel efficiency improvements alone. Despite challenges and public concerns, proponents believe that mandatory road usage charging programs will become necessary in the near future to ensure sustainable transportation funding.