Does NYC have major transfer points where two lines share each platform track that have the same level of passenger turnover Boston sees at Park St and Downtown Crossing? (My experience actually riding the New York City subway is extremely limited, so I don't know the answer to this. I bet South Ferry has higher turnover than Park St, but IIRC South Ferry is also on a branch and doesn't see as many trains per hour as some of the other stations. I also seem to recall reading that NYC has some express stations with a center island platform and side platforms for the local tracks because they don't want people changing between express and local at those stations, presumably because high turnover would kill the dwell times with their limited door capacity (or maybe the only issue is amount of storage space on the platforms while people wait for the next train?))
I thought I saw something claiming the new Red Line cars will have wider doors than the existing 1500/1600/1700 series cars, but same width as the 1800 series cars. Has the MBTA published anywhere the width of the 1800 cars' doors and the width of the future cars' doors?
I certainly agree that door quantity and width is not going to magically fix the entire capacity issue by itself, but it also wouldn't surprise me if 1800 series cars with crush loads and Park St turnover require longer than 30 second dwell times even if you had infinitely large platforms and connecting passageways to the Green Line, and I'd like to see a bit more data on whether the T is doing everything possible to make sure door width on the new cars isn't unnecessarily contributing to the overall problem.