Comment by jakecopp

Would this method work for GTFS Bus routes?

I'm also keen to port it to Sydney's train network as we have GTFS and GTFS realtime!

GTFS realtime is a lot of fun, I built a simple JSON real time API for Sydney buses which could be easily ported to other GTFS realtime feeds: https://github.com/jakecoppinger/sydney-bus-departures