I think adding stops defeats the entire point of Logan Express, which is a fast ride to the airport as reliable and quick as if you're driving yourself from that area, and with the cars being stored way out of town and not interfering with anything.
The existing Framingham Logan Express service only departs Logan once every half hour.
Is there some trick to only booking flights that will land with timing such that you'll always get to the Logan Express bus stop a minute before the bus arrives?
Adding more stops may increase ridership which in turn may justify improved frequency; it's possible that the average travel time from when a person arrives at the bus stop to when they get to their destination might improve if more stops being added leads to more demand which justifies more frequency.
Newton Corner - Has express buses already. Express bus to SS -> SL is not exactly some huge barrier to use now.
How often does the South Station to Newton Corner express bus run if your flight lands at 8:00 PM?
Additionally, anything using the exit 17 ramps is immediately subject to large time delays. It may not add anything to the odometer, but you're easily adding 15 minutes to the potential trip time for those Framingham passengers by making the bus take those ramps.
That seems a little hard to believe when the published weekday 57 bus schedule for a trip late in the morning rush hour is 8:06 Watertown Yard, 8:09 Washington @ Bacon, 8:11 400 Centre St, 8:11 Park St @Elmwood, 8:12 Tremont St opp Hibbard Rd, 8:12 Tremont St @ Waverly Ave; 6 minutes to cover a lot more than just a trip around most of the Newton Corner circle, and including dwell time at bus stops.
The road also appears to be wide enough that if traffic were a problem we could create a bus lane, and given 57 is a key bus route that ought to be justifiable.
There's also no parking here, so who's riding this thing? I don't think local volumes to the airport are high enough, Back Bay only works because of high business travel volume/transit nexus/population density there.
The whole point of making multiple stops is that you don't need to collect 40 passengers from each stop on every trip. Additionally, it would probably be possible to build a parking garage over the Pike at Newton Corner if that would be useful for airport travelers.
West Station - If West Station exists, getting to the existing Back Bay Logan Express should be pretty easy (or just riding in to switch to Blue), seems very unnecessary.
How many transfers do you expect for a West Station to airport terminal via Blue Line transit trip? Also, if you believe that, why shouldn't we just eliminate the Framingham Logan Express and tell people to take the Framingham Line to South Station and transfer to the SL1?
Riverside - With Framingham already existing, it doesn't seem like the catchment area makes a whole lot of sense. The Logan Express locations are situated at the routes into the city to be able to skim off a portion of those the people traveling from a wide range of areas towards the airport. Ex: Framingham catches everyone coming from the Western axis, whether that's Springfield, Worcester, or whatever. In contrast, Riverside's catchment area would be....people living right near 128, between roughly Norwood and Waltham (and duplicating the service Framingham provides). Also, getting off the Pike mainline, going around all the ramps, and getting back on again is not a trivial amount of time at peak hours, just as with Newton Corner.
How many Norwood and Waltham residents are going to drive out to Framingham to park there to take Logan Express?
And if the ramps to Riverside are congested at peak times, we should either look at whether we can add bus lanes there, or look at a congestion toll funding better transit to reduce the number of vehicles.
