Was going to post this - have users submit the track data! That also might make it easier to expand to other stations where you aren't as familiar with the track layout.

Google almost certainly already could, without even asking the commuters, since they have real time location for so many Android phones. But there's a chicken and egg problem: it's hard to get the data before you're able to offer anything in return.

Thank you! I definitely considered doing something like that, however — the amount of work required to crowd source the data would be significant. There would be a “chicken & egg” problem — the app wouldn’t be useful to first users, and without the first users, there wouldn’t be enough data to make it useful for everyone else — so this would require a fairly large marketing campaign to get off the ground. But — one day I may still do it :)

This is something that Clever Commute does and it works really well!