Major Trends

Highway Passenger Travel

Transit Ridership

U.S. Air Carrier Passenger Travel

Rail Passenger Travel

Rail Freight Carloads

Rail Freight Intermodal

Truck Tonnage

U.S. Waterways Freight

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.

U.S. Department of Transportation, Bureau of Transportation Statistics, Seasonally-Adjustment Transportation Data.

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