* [https://github.com/google/transitfeed/wiki/FeedValidatorErrorsAndWarnings FeedValidator's errors and warnings] reference provides an inventory of some common GTFS defects to avoid. feedvalidator.py software can automatically identify these potential issues.
* [https://trilliumtransit.zendesk.com/hc/en-us/articles/201876369-Display-of-headsign-Google-Maps- Best practices and application-behavior context for specifying headsigns] in GTFS from [[Trillium]].
* The Center for Urban Transportation Research at the University of South Florida has identified [https://github.com/CUTR-at-USF/gtfs-realtime-validator/
wiki/ Rules-and-Test-Cases some best practices] as part of their experience with GTFS-realtime feeds.
[[Category:General Transit Feed Specification]]