The "affordability" of the automobile in the 1950s changed American culture.
Affordability is in quotes because the automobile manufacturers did something tricky. They got the US government to pay for the building and maintenance of roads.
So, unlike the train system where the train companies have to build and maintain tracks, the auto makers only had to make the cars.
This reshaped our country, allowing roads and cars to become the primary means of transportation in the country. In turn, people could then live outside of cities allowing suburbs to be created and fast food restaurants to be invented for people in the car on the go.
To complete general education requirements at a 4 year college, which is called a “college degree,” the undergraduate bachelor’s degree generally takes 4 years to complete, and needs 120-128 semester credit hours. The 4 years are typically known as the freshman, sophomore, junior and senior year, where the final 2 years are spent taking more courses that are directly related to your major (emphasis for special professional areas).
The completion of transcontinental railroads in the United States and Canada