What was one reason for the interstate highway system begun in the 1950s

The construction of the Interstate Highway System was authorized by the Federal Aid Highway Act of 1956, popularly known as the Interstate Highway and Defense Act of 1956.

It was a petition of the largest automobile manufacturers in the United States and promoted by President Dwight D. Eisenhower - influenced by his experiences as a young soldier crossing the United States in 1919 following the route of the Lincoln Highway and the knowledge of the German motorway network (Autobahnen) during World War II - as a necessary component of a national defense system. This would make possible a better displacement by land of troops and military supplies.

The design of a system of new superhighways began in the late 1930s, even before a federal committee was formed to build the Interstate Highway System in the 1950s. In the 1920s, some roads, such as those in the New York area, were built as part of the local or state systems.

just need the points

explanation:

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.