A tunnel under Dorval station would be more convenient as well if the goal is to get a multimodal station.
I thought of a 3-branch new REM coming from Gare Lucien L’Allier. One branch for Lachine and Exo 4, one for the multimodal Dorval station (the main antenna), and a last 10-min train frequency branch for the airport finishing at Marie-Curie station.
In order to make an interstation with the REM A, I transformed the Anse-à-l’Orme REM branch a bit. I used the abandonned track parallel to André avenue and coming back on Alfred-Nobel boulevard.
