Monthly data, not seasonally adjusted
The National Railroad Passenger Corporation (Amtrak) officially began service in May 1971. Amtrak offers services in 46 states on a network of over 22,000 track miles. Ridership data are highly seasonal, with July and August being very high season months. In 2000, Amtrak introduced a high-speed rail service in the northeast U.S., which helped increase ridership.
|Amtrak Revenue Passenger Miles||Aug-07||Aug-08|
|Amtrak revenue passenger miles (millions)||564.0||614.9|
|Percent change from same month previous year||8.00||9.02|
NOTE: the current value is compared to the value from the same period in the previous year to account for seasonality.
SOURCE: U.S. Department of Transportation, Federal Railroad Administration, Office of Safety Analysis, available at http://safetydata.fra.dot.gov/OfficeofSafety/ as of November 2008.