Moving People: January 2000–July 2016
Notes: Graph scales are not comparable. Seasonally adjusted data measure the real differences in data trends by adjusting for seasonal factors, such as the change in the number of days, weekends, holidays, or other seasonal activity in a month such as vacation travel.
Source: Seasonally adjusted transportation data–U.S. Department of Transportation, Bureau of Transportation Statistics, available at www.bts.gov as of October 2016.