Delvin4519
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This is excellent and fascinating. Using Sunday service as a "minimum guaranteed service" framework is a really interesting idea and a very thought-provoking prism through which to view the network.
I think those last three maps are particularly interesting. The last one is course an indictment of the current service levels. (I half-heartedly wonder whether there's an equity lawsuit there, given that it does look, broadly, like highest frequencies have been maintained in areas that are on average whiter and/or more affluent.)
That 20-min map seems like a pretty good articulation of the "bones" of the network, and of course maps pretty cleanly on to the Key Bus Network and the BNRD's high-freq network. I'm not sure I have anything particularly insightful to say but I do think it's interesting that "services that run at least every 20 minutes on Sundays" seems to map on to what "feels" like the "bones" of the network.
But that 15-min map is really interesting for drawing attention to the 1 and 111 sitting in a tier above the other bus routes. We know they're important, but this is another articulation of that, which is quite striking.
(I think you might be able to do this automatically somehow using Tableau plus Blue Book data?)
Sunday service as a "minimum guaranteed service" mapping, is one of the most important ways to look at a transit system. It has several important connotations, for which, which places can one live without a car, which areas have the most frequent connections in multiple directions, and which commutes/transfers are the most easiest to make without a huge time penality for transferring. It shoes how a transit system caters to riders who do NOT work 9-5 in downtown Boston, by looking at only services that operate 7 days a week and their frequencies on Sundays, late evenings, and early mornings. Therefore, a look at commutes that may need to be made at any time, a transit system that works any time, not just rush hour to downtown.
Technically, if the 22, 23, and 28 could somehow be coordinated on their shared portions, it would theoretically be possible to mark a segment from Ruggles, to Warren St. & Geneva Ave., as a "10 minutes or better", for the 23 and 28. The same is also true for another disjointed segement of Blue Hill Ave. where the 22 and 28 overlap.
I've double checked their Sunday schedules, and their schedules have zero coordination at all, with slightly different headways for each bus route at all hours of the day, hence I've left all of them as "every 15 - 20 minutes" each.
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