Answer :
The major effect of the Interstate Highway Act of 1957 was that it created "an increase in the populations of midwestern and western cities" More people could travel there with ease.
The correct answer is D) an increase in the populations in the Midwestern and Western cities.
One of the effects of the Interstate Highway Act of 1957 was an increase in the populations in the Midwestern and Western cities.
The importance of the Highway Act of 1957 is that it allowed the construction of nearly 40,000 miles highway system in the United States, that spread throughout the nation. One of the effects of the Interstate Highway Act of 1957 was an increase in the populations in the Midwestern and Western cities. It created jobs for the construction of this vast system of highways, taxes help with the money for constructions and the new ways helped people to get to different parts of the countries in less time.