forbidden_prior_notice_start_day

prior_notice_start_day value is forbidden when prior_notice_duration_max is set.

ERRORGTFSintegritydraftMobilityData canonical GTFS Schedule validator

Related

• Source: MobilityData canonical GTFS Schedule validator

Citations

[1] forbidden_prior_notice_start_day rule reference

Rule metadata

Code	forbidden_prior_notice_start_day
Standard	GTFS
Source	MobilityData canonical GTFS Schedule validator
Severity	ERROR
Category	integrity
Maturity	draft
Tags	mobilitydata, gtfs, integrity
Retrieved	2026-06-12
Reference	https://gtfs-validator.mobilitydata.org/rules.html#forbidden_prior_notice_start_day