The automobile industry was one of the most important growing industries in the 1920s. Due to the efforts of Henry Ford a few years earlier, his assembly line process allowed automobiles to become a mass-produced item available to the vast majority of Americans during the decade.
The number of automobile owners nearly tripled to 23 million by the end of the 1920s. The vast majority of these cars were Ford's Model T. Due to the influx of automobiles, the government passed the Federal Highway Act in 1921, which helped aid state and local governments to build highways and roads, and added funds to help clear forests for highways. Additionally, travel industries popped up, including motels, roadside diners and gas stations.