Answer :
The main importance of the Federal Highway Act of 1956 was that "B.) It helped boost the economy and encouraged the growth of suburbia," since it made it far easier for people to travel long distances.
Correct answer:
B.) It helped boost the economy and encouraged the growth of suburbia.
The National Highway Law was passed on June 29, 1956. The project created a national system of interstate highways that would eliminate insecurity, inefficient routes, and traffic. Through the owners of service stations and suburban developers, they hoped to convince state and local governments that roads were a public concern and could improve the economy.