gtfs-realtime is used at run time in 5 crates.

Depender (with downloads and own rev deps) gtfs-realtime version
350 2 amtrak-gtfs-rt ^0.1.3
250 rtc-quebec-gtfs-rt ^0.1.4
200 via-rail-gtfsrt ^0.1.3
180 zotgtfs ^0.1.2
180 chicago-gtfs-rt ^0.1.0