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

Depender (with downloads and own rev deps) gtfs-realtime version
1.0K rtc-quebec-gtfs-rt ^0.1.4
390 2 amtrak-gtfs-rt ^0.1.3
230 via-rail-gtfsrt ^0.1.3
170 chicago-gtfs-rt ^0.1.0
170 zotgtfs ^0.1.2