Passenger Travel - Box

Passenger Travel - Box

Estimating Passenger-Miles of Travel

Passenger-miles of travel are estimated on a yearly basis by adding together estimates for each mode, which are derived from separate sources. Passenger-miles of travel for large air carriers and intercity trains are estimated from tickets and are very accurate. A variety of methods are used to estimate travel in other modes, each with different strengths and weaknesses. For more information see the Accuracy Profiles in BTS's National Transportation Statistics 2001 (www.bts.gov).