This isn't really the thread for this, but if we're going to have 15-minute headways on the B&A there isn't a choice but to have Newton Corner stop. In the past I've heard people say "if it's too hard just skip it", but you'd be really kneecapping the entire corridor by not including Newton Corner. I don't think a P&R facility is necessary and I don't think we want to be doing anything to encourage more cars through the "circle". Riverside will be the P&R kings which is why I do think it's worthwhile to actually build a terminating station there.
Newton Corner already holds its own for how bad the service is today. The 501/[502/503]/504 -- routes that's shouldn't exist in the first place and get stuck in traffic on the Pike -- are one of those secret corridors on the bus network that a lot of people don't realize exist unless you use them frequently. Similar to the
comparison between Lynn and Quincy @Riverside wrote up a few weeks ago, possibly to an even bigger extent, the west side bus situation would be massively improved with better rail connections. This is from 2019, but if you look at the bus frequencies only at Peak, it's wild how much the MassPike lights up compared to every other corridor. The only corridors that saw more buses at peak than than the MassPike buses to Newton Corner were Roslindale Village to Forest Hills and Ruggles/Roxbury Crossing to Nubian
View attachment 33347
With trains every 15 minutes to Newton Corner, and all the other Newton stops, those buses could all be discontinued and allocated to do something else and the rest cut back to Newton Corner, building out the bus network in Brighton, Newton, Waltham, and Watertown. It would probably also make sense to extend the 71 to Newton Corner and put some kind of bus lanes on Centre/Galen. The west-side bus situation is exacerbated from a lack of garage (the 500s area all Albany routes), so there would would be
a lot of potential to build out new corridors to feed into the other Newton stops on the B&A and on the outer D (which suffers from lack of bus connections, and would likely see some ridership decrease with better service on the B&A).