What federal act governs the use of federal funds for transportation projects?

The Fixing America's Surface Transportation (FAST) Act is the correct choice because it establishes comprehensive policies for federal funding of transportation projects. Enacted in December 2015, the FAST Act authorized the use of federal funds for various transportation initiatives, including highways, transit systems, and safety programs, over a five-year period. This act helps ensure stable and predictable funding for critical infrastructure projects, promoting economic growth and enhancing the nation's transportation system.

By contrast, while the Transportation Equity Act and the Federal Highway Bill have also played significant roles in transportation funding and policy, they are not the current governing acts for federal transportation project funding. The FAST Act supersedes earlier legislation, making it the most relevant and up-to-date law governing the use of federal funds in this context. The Infrastructure Investment Act, though related to transportation and infrastructure, is a broader initiative that encompasses various sectors, while the FAST Act specifically focuses on roadways and public transit systems.