The Highway Trust Fund is a federal fund in the United States that finances the construction and maintenance of the nation's highways, bridges, and public transportation systems. It is primarily funded through federal fuel taxes collected from gasoline and diesel sales. This fund ensures that states receive financial support for transportation projects, helping to improve infrastructure and promote safe travel. Established in 1956, the Highway Trust Fund plays a crucial role in the nation's transportation policy. It is managed by the Federal Highway Administration and is essential for maintaining the quality of roads and transit systems. Without this funding, many infrastructure projects would face significant delays or cancellations.