1. Post-war economic boom: After World War II, the United States experienced a period of rapid economic growth, which led to increased disposable income and a desire for new consumer products. Automobiles became more affordable and accessible to a larger segment of the population.
2. Improved road infrastructure: The federal government's investment in the interstate highway system in the 1950s and 1960s made it easier and more convenient to travel by car. This led to the development of suburbs and the increased use of cars for commuting, leisure activities, and road trips.
