Investing in the nation’s infrastructure provides far-reaching economic benefits. Recent congressional support for roads, bridges and public transportation systems has helped deliver much-needed projects to every congressional district across the country. These improvements have enhanced safety, mobility and efficiency nationwide. These outcomes are made possible by the continuity and predictability of funding supported by a healthy Highway Trust Fund (HTF). At present, HTF revenues are generated primarily through user fees on the sale of gas and diesel fuels, along with transfers from the General Fund to make up for insufficient revenues. However, improvements to vehicle efficiency and the influx of hybrid and electric vehicles have resulted in a system where all users of the system are not treated fairly. Instead, some users pay for the maintenance of the system, while other users pay less or nothing at all. At the same time, user fee revenue has not met system needs.