During the 1950s, suburbs were built farther away from major cities in order to house the increasing population. what was one result of the needs created by the new housing developments?

a. the creation of the department of transportation, which administered interstate commerce regulations
b. the passage of the national interstate highways act, which authorized an improved system of roads
c. the funding of the national highway traffic safety administration, which promoted automobile safety
d. the enactment of the surface transportation assistance act, which allowed states to set speed limits on rural highways