25 Most Extensive Metro Systems In The World

Posted by on December 26, 2012

Measuring the most extensive metro system in the world isn’t as cut and dry as it seems. First off, what exactly constitutes a metro? Does it have to be underground? And do we count the number of stations or the length of the track? Generally the two follow one another closely but not always. For the purposes of this list we decided to go with length of track but we are by no means claiming that this is the best or only way. So keeping all of this in mind we bring you the 25 most extensive metro systems in the world.


Bay Area Rapid Transit (BART)

Serving the San Francisco metropolitan area, BART operates five lines on 104 miles of track with 44 stations.


Washington Metro

Commonly referred to as the Metrorail, Washington’s rapid transit system is the second busiest in the United States after the New York Subway.


Chicago ‘L’

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.