For those of you confused (and you should be, the media hasn’t been very clear on this), public transit is free throughout the STM and STL networks, including the metro and its three new stations.
Little mentioned so far is that the AMT will be running special free trains from the De la Concorde metro to Saint-Jerome to celebrate its new intermodal station. The line, which normally only runs on weekdays, will have four special round trips during the day Saturday and Sunday.