I had a chance to ride the small open section of the RER today. (I believe that Rome was built faster than the RER.)
I was extremely impressed. Everything felt incredibly modern and the ride was very smooth.
My one complaint is that the front jump seats are obscured by large plastic humps.
The Brossard Station had ample free parking and 60 EV chargers, which was a welcome site to this EV owner. The route from Brossard is a bit serpentine, but it felt overall fairly competitive with driving.
I stayed overnight at the Courtyard hotel that is a short walk from the RER. They have free parking as well, so it’s a nice option to stay somewhere well connected to downtown.
When the system is fully built out, it will truly be a world class light rail system.
And just in case you thought that Moynihan lines were long, here is a photo of Gare Central.
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