Probably more than 10 years ago now, I created a personal web app that pulled the "headway" listings for the various stations. The idea was you could be outsid

Probably more than 10 years ago now, I created a personal web app that pulled the "headway" listings for the various stations. The idea was you could be outside the station and know when to go to the station or know if you had to rush down the stairs to catch a train. During hon-peak hours, the interval times could be 15 - 30 minutes, so timing was everything. Back then (and maybe now) Metro would not report a time greater than 20 minutes, but you could check stations up the line to see if a train was coming to your station. The system worked okay unless single tracking was involved, in which the data is not reliable.