| Rank | Ridership | Answer | % Correct |
|---|---|---|---|
| 9 | 41,775,100 | Metro rail, Los Angeles | 100%
|
| 1 | 2,723,960,100 | New York City Subway, New York City | 100%
|
| 12 | 7,741,000 | Staten Island Railway, Staten Island (New York City) | 100%
|
| 3 | 218,467,000 | Chicago "L", Chicago | 97%
|
| 5 | 123,510,000 | BART, San Francisco Bay Area | 96%
|
| 4 | 152,339,700 | MBTA Subway ("T"), Boston | 96%
|
| 11 | 11,107,500 | PATCO Speedline, Philadelphia-Camden | 91%
|
| 7 | 90,240,800 | SEPTA, Philadelphia | 91%
|
| 2 | 237,701,100 | Washington Metro, Washington D.C. | 90%
|
| 10 | 18,073,100 | Metrorail, Miami | 89%
|
| 8 | 63,998,500 | MARTA rail, Atlanta | 85%
|
| 6 | 90,276,600 | PATH, New York metro area | 82%
|
| 13 | 7,325,500 | Baltimore Metro SubwayLink, Baltimore | 80%
|
| 14 | 5,958,000 | RTA Rapid Transit, Cleveland | 71%
|
| 15 | 5,233,900 | Tren Urbano, San Juan | 33%
|