GTFS-realtime test harness for frequency-based trips
Introduction
This is a Python-based test harness which can be used to simulate a GTFS-realtime feed with trips on a frequency-based route. Specifically, it simulates arrivals on the AirBART route (obtain BART GTFS here), at the AirBART_OAK stop. For convenience, the script simulates two vehicles, which are perpetually three and seven minutes away, respectively.