| Rank | Agency | Number of unlinked trips (thousands) |
|---|---|---|
| 1 | MTA New York City Transit (NYCT) | 2,803,464 |
| 2 | Chicago Transit Authority (CTA) | 494,729 |
| 3 | Los Angeles County Metropolitan Trip Authority (LACMTA) | 482,816 |
| 4 | Washington Metropolitan Area Transit Authority (WMATA) | 408,988 |
| 5 | Massachusetts Bay Transportation Authority (MBTA) | 380,261 |
| 6 | Southeastern Pennsylvania Transportation Authority (SEPTA) | 323,051 |
| 7 | New Jersey Transit Corporation (NJTransit) | 255,294 |
| 8 | San Francisco Municipal Railway (MUNI) | 210,848 |
| 9 | Metropolitan Atlanta Rapid Transit Authority (MARTA) | 138,403 |
| 10 | Miami-Dade Transit (MDT) | 107,094 |
| 11 | Maryland Transit Administration (MTA) | 107,024 |
| 12 | King County Department of Transportation (King County Metro) | 106,274 |
| 13 | San Francisco Bay Area Rapid Transit District (BART) | 103,654 |
| 14 | Metropolitan Transit Authority of Harris County, Texas (Metro) | 102,478 |
| 15 | Tri-County Metropolitan Transportation District of Oregon (TriMet) | 101,575 |
| 16 | MTA Long Island Railroad (MTA LIRR) | 99,520 |
| 17 | MTA Bus Company (MTABUS) | 99,169 |
| 18 | Denver Regional Transportation District (RTD) | 86,571 |
| 19 | Port Authority Trans-Hudson Corporation (PATH) | 78,283 |
| 20 | Metro-North Commuter Railroad Company (MTA-MNCR) | 77,071 |
| Total, top 20 agencies | 6,566,568 | |
| Total, all agencies | 10,017,000 | |
| Top 20 agencies, percent of all agencies | 65.55% |
NOTES: Data may not add to total because of independent rounding.
According to the American Public Transportation Association (APTA), an unlinked transit trip is a trip on one transit vehicle. A person riding one vehicle from origin to destination takes one unlinked trip; a person who transfers to a second vehicle takes two unlinked trips; a person who transfers to a third vehicle takes three unlinked trips. A linked trip includes all segments on all vehicles used to travel from origin to destination.
SOURCE: American Public Transportation Association, 2008 Public Transportation Factbook (Washington, D.C.: June 2008), tables 3 and 5, available at http://www.apta.com/research/stats/index.cfm as of July 2008.