Typically they do not. The Agencies _might_ submit GTFS data, but rarely do any of these vendors provide real time data in GTFS-RT that Google/App and other would need.
I find commercial apps like transit and moveit are only willing to work with bigger cities, and have very little interest in smaller agencies.
I find commercial apps like transit and moveit are only willing to work with bigger cities, and have very little interest in smaller agencies.