How the interstate highway system was created?

Late 1950s under president Eisenhower. The full name of the system is "The National Defense and Interstate Highway System".

Eisenhower created the interstate highway system so that during a time of crisis (such as an invasion of the US) troops could be moved around easier it also served as a convenience to all Americans...

By the 1950s, almost every family of the middle class owned a car. This fueled the growth of businesses devoted to cars and, in turn, dependent upon automobile traffic. Service stations, doubled in...

One major effect of the interstate highway system was it made traveling to land and businesses faster and easier, and this cut down on gas prices so it also made traveling cheaper.

The last stretch of the original Federal Highway Act (FAHA) of 1956, interstate 105 in Los Angeles, was finished in 1993.