However , this growth was not continuous : in the late 1960s and early 1990s , ridership had declined in some periods .
Montreal has one of North America 's busiest public transportation systems with , after New York , the largest number of users compared to its population .
This growth was not continuous : in the late 1960s and early 1990s , ridership had declined in some periods .
Montreal has one of North America 's busiest public transportation systems with , after New York , the largest number of users compared to its population .