The mainstream use of the car was a cause and a means of population growth in California. Between 1900 and 1930, the population of California nearly tripled, coinciding with the new concept of the car as an essential part of daily life. Many flocked to Los Angeles, where suburban expansion increased at an unprecedented rate largely due to the availability of the car.
Even during the Great Depression, of the 1930s, the population continued to increase as those seeking to escape the Dust Bowl came to California to work in the fields. California's population expanded greatly during World War II, as people traveled once again by car to work in the newly-built aircraft and shipbuilding plants in the state.