[dkrich]

I wonder if there's any correlation or way to know based on where a train is arriving from to know where it's headed. If that were the case, you could potentially either look for that data, or if it isn't available, have a Waze-like app where commuters can report which train they are on and which track they are pulling into.

As an aside, I wonder whether the OP considered charging a hefty price (>$20 or so) for the app. This would lessen the number of users and page requests.

Having travelled from Penn many times and having had to deal with the massive stampede that ensues when they suddenly reveal the track number, I would pay dearly to have this info available to me. Even if I used it once every year, not having to fight crowds or look forever to find an available seat, that would be money well spent. Additionally, many of the peak travelers are business travelers who probably have more money to spend on an app. I realize this isn't the most democratic solution, but it could be a way to lessen the crowds nonetheless.