Editing Cross-platform interchange (section)

==== Montreal ====
[[File:Lionel-groulx-montreal-metro.jpg|right|thumb|[[Lionel-Groulx station]] in [[Montreal]]]]
Two transfer stations in Montreal feature cross-platform interchange. At the [[Lionel-Groulx station]], the upper platforms serve Henri-Bourassa or Montmorency ([[Line 2 Orange (Montreal Metro)|Orange Line 2]]) and Honoré-Beaugrand ([[Line 1 Green (Montreal Metro)|Green Line 1]]) trains, ''entering'' downtown; the lower platforms serve Côte-Vertu (Orange Line 2) and Angrignon (Green Line 1) trains, ''leaving'' downtown.  Since most transferring passengers are either entering or leaving downtown, most transfers at this station are cross-platform.

At the [[Snowdon station]], however, the outbound Orange Line platforms are at the same level as the Blue Line terminal platform, with the inbound Orange Line platforms linked to the Blue Line departure platform, reducing efficiency. This is explained because the Blue Line was originally planned to be continued west of the station, in which case this arrangement would have provided the same benefit as the arrangement at Lionel-Groulx.