Bay Area Rapid Transit (BART)
Serving the San Francisco metropolitan area, BART operates five lines on 104 miles of track with 44 stations.
Commonly referred to as the Metrorail, Washington’s rapid transit system is the second busiest in the United States after the New York Subway.
Short for “elevated”, the L is the rapid transit system serving the city of Chicago and its surrounding suburbs. It’s the second longest rapid transit system in the United States after New York and third busiest (after New York and Washington D.C.)
Mass Transit Railway (MTR)
The official rapid transit railway system in Hong Kong, MTR covers 108 miles of track and stops at 82 stations.
This large suburban network crosses the city of Valencia, with all trains continuing out to far-flung suburbs. It has 109 miles of track and 169 stations.