True or False: TEA-21 built on initiatives established by the ISTEA of 1991.

Answer: A — True

The statement is true because TEA-21, or the Transportation Equity Act for the 21st Century, was enacted in 1998 and indeed built upon the foundation established by the Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991. TEA-21 sought to continue and expand the federal transportation programs initiated by ISTEA, which emphasized the importance of intermodal transportation, increased funding for highways, and promoted environmental considerations in transportation planning. By enhancing and extending the objectives set forth in ISTEA, TEA-21 advanced strategies for improving the transportation infrastructure, thus fostering greater efficiency and safety within the transportation system as a whole. This continuity shows a clear evolution in transportation policy, making the answer true. Understanding this context highlights the importance of legislative progression in transportation and how newer laws build on previous foundational work, ensuring that they address emerging needs and challenges while retaining successful components from the past.