I believe the cost of the projet and the cost of the operations are two separate things.
I believe most stations don’t have platforms that can accommodate PSDs right now, which makes it more expensive. The new stations will be built so that PSDs can easily be added in the future.
response simple : ca arrive jamais 
PSD are not only the doors, they require IT systems, platform and train sensors, integration, monitoring, training, spare parts, maintenance & repair procedures, etc.
PSD are critical elements as non-functioning PSD would prevent users from entering and exiting the trains, thus a safety hasard.
The initial PSD setup would need to include the whole backend & processes, regardless for 1, 5 ou 68 stations. Thus quite prohibitive only for the 5 stations blue line extension.
Thus the best they can do at the moment, considering the budgetary situation, is to request for the new stations to have provisions for eventual PSD e.g. more robust platforms, per-installed conduits for future electrical and network wiring, etc.
That’s just an excuse. If they really wanted to add platform doors, there are solutions. They could have gone with an open top above the track. They also could have gone with half height doors instead of full height doors. They just don’t want to spend the money.
Bon s’ils dépensent pas tout l argent?
Ça ne fait pas beaucoup de sens d’installer des portes palières sur la ligne bleue avec 4 portes par wagon quand ces wagons seront éventuellement remplacés par des Azurs à 3 portes. Ils vont devoir tout réinstaller quand on aura des Azurs. Je pense qu’ils vont attendre d’avoir des Azurs avant de faire ce move.
They got the money? 
Usually, it’s a fairly painless operation if platforms are already designed to support them. I believe that Lille was able to install them during the night when they were extending their metro platforms.
Fair point. STM is picking and choosing their very tight budget currently, so PSDs are just not prioritized but at least they’re making it able to support them in the future
Le prolongement va ouvrir avec des trains Azur en raison du remplacement du système de contrôle des trains. Les MR-73 iront mourrir sur la ligne verte des l’ouverture du prolongement (2031/2032) et il n’y aura que des Azur sur la Bleue… Ils auraient pu mettre des portes pallieres.
Aussi, pourquoi les Azurs ne peuvent-ils pas aller sur la ligne jaune?
They absolutely can, there’s been videos of tests done on the yellow line with them.
It’s probably cause they don’t have a use for it
Thanks!
Une question d’énergie… Les Azur tirent trop de courant. Il faut que la STM finisse les nouveaux postes de redressement avant d’offrir un service complet avec des MPM-10 sur la ligne jaune. Quoique je ne sais pas si c’est corrigé depuis.
Do they tell people that the doors in those first three cars will not open at St-Michel?
They’re test trains and don’t allow passengers
You just know the dude standing on the yellow had a WTF face right then.
