(Number per 100,000 revenue vehicle-miles)
NOTES: Interruptions of service include major and minor mechnical failures. If the vehicle operator was able to fix the problem and return the vehicle to service without assistance, the incident is not considered an interruption of service.
Light rail includes streetcar-type vehicles operated on city streets, semiexclusive rights-of-way, or exclusive rights-of-way. Service may be provided by step-entry vehicles or by level boarding. Commuter rail includes urban passenger train service for short-distance travel between a central city and adjacent suburb. Heavy rail includes electric railways with the capacity to transport a heavy volume of passenger traffic and characterized by exclusive rights-of-way, multicar trains, high speed, rapid acceleration, sophisticated signaling, and high-platform loading. Also known as "subway," "elevated (railway)," or "metropolitan railway (metro)." Demand responsive transit includes nonfixed-route, a nonfixed-schedule vehicles that operates in response to calls from passengers or their agents to the transit operator or dispatcher.
SOURCE: U.S. Department of Transportation, Federal Transit Administration, National Transit Library, 2001 Reporting Manual, available at http://www.ntdprogram.com/, as of April 2003; and American Public Transportation Association, Maintenance data tables, available at http://www.apta.com/research/stats/maint/index.cfm, as of April 2003.