 It has expanded since the 1960s from 26 stations on three separate lines to 68 stations on four lines totalling in length, serving the north, east and centre of the Island of Montreal with connections to Longueuil, via the Yellow Line, as well as the suburb of Laval, via the Orange Line.The Montreal Metro is Canada's second busiest rapid transit system and North America's fourth busiest rapid transit system, behind the New York City Subway, the Mexico City Metro and the Toronto subway, delivering an average of 1,367,200 daily unlinked passenger trips per weekday (in Q4 2018).In 2016, 354 million trips on the Metro were completed (transfers counted as separate trips).