The problem is not the bus terminal but the bus service itself.
Vaudreuil will get at best half hourly service during the day and during rush hours (7 to 9) there will be roughly 9 departures. At 50 pax/bus that’s only a capacity of 450 passengers to the REM.
Add the Ile Perrot/Dorion lines (591 and 790) with their combined 4 departures towards the REM, that’s a capacity of 200 passengers.
On the STM side, the only line that will bring in commuters towards the city center is the 212, with 5 departures, so a capacity of 250 passengers
Total capacity is only 900 passengers where this station serves an area with a 100k population, including rapidly growing regions. The 200 stall parking lot will be full by 6AM every day, giving access to the station to 1100 persons, IF all busses are full. This is nowhere near “transformative”, nor a proper way to ensure that this population has actual access to the REM. Without serious changes, people will continue to drive all the way to the center of the island/downtown.
The population figure is comparable to the combined Chambly/Carignan/SJSR (or consider a portion of Brossard instead) population served by the Brossard terminal. Yet, that area has way more RTL busses on top of a 2k stall parking (that gets full every morning, at least the free portion).
On top of it, the way EXO bus service is structured is absolutely unattractive. It forces most people to go through the Vaudreuil terminal which is now longer to access by car with all the development around it, or for the few lucky ones, take one of the few local busses if their schedule allows. In both cases it is at least 1 tansfer on a not really frequent bus, only to cross the bridge, forcing you to pay a zone C ticket on top of it, vs a zone A ticket at AAO. Even paid parking at AAO will be popular given the fare saving and removing the transfer pain & time savings.
I understand that in theory, busses have the potential of brigning in more ridership than parking, but actual, attractive and sufficient service has to be provided, which is far from the case here. We just have to realize that given the current transit budget crisis, relying solely on a bus-heavy model to feed the REM in the West Island is a failure. Excuses won’t make people get out of their cars, actual alternatives will.
Frequent and direct busses to the REM straight from the denser areas of Vaudreuil, Dorion, Ile Perrot and express service with small parking lots along the 40 would have been a proper replacement to a large size parking lot in AAO, but this is far from being the actual service. In the current context, the best short term solution is to add proper paid parking at AAO.
Radisson is not a great comparison here as it is located and serves an area that is way more urban, and gets busses from both the south and north shore. AAO is truly suburban by nature, the same way the Brossard terminal is. In both cases, the use is to serve areas far beyond the station and not really the immediate surroundings as there is basically nothing. A good comparison to Radisson is (pre-REM) Cote Vertu that serves the local area, as well as EXO, STL and West Island STM.