What is the purpose of federal transportation policy and the Highway Trust Fund?

• A. To regulate rail safety.
• B. To fund transit only through general revenue.
• C. To fund freight shipping only.
• D. To fund roads, bridges, and transit through federal grants; the Highway Trust Fund is financed by gas taxes.

Answer: (D)

Federal transportation policy is about funding and maintaining a national, multi‑modal transportation system—roads, bridges, and public transit—through dedicated federal funding rather than general revenues. The Highway Trust Fund channels money to states via federal grants specifically for highways and transit projects, ensuring a coordinated, long‑term program. This fund is financed by gas taxes (user fees tied to usage), not by general taxes, which is why the revenue source matches the purpose of the investments. That combination—funding roads, bridges, and transit through federal grants sourced from fuel taxes—best captures how the policy and the fund operate. The other options misstate the scope or the financing: rail safety is handled separately, transit isn’t funded solely from general revenue, and freight shipping alone isn’t the focus.