Hi all,

I started using OSM fairly recently and one thing I've been working on in
my city is improving the route relations for public transit (bus only in my
city). This has included cleaning the ways included in the routes (such as
including the entirety of roundabouts instead of just the portion used,
having many gaps, roads out of order, or roads included multiple times when
they should not be) as well as creating new relations when both outbound
and inbound are mapped together or for route variants.

Now on the topic of route variants, I'm wondering what that best practice
is for marking opening_hours (as mentioned on the Buses wiki page
<https://wiki.openstreetmap.org/wiki/Buses#Step_2_-_Create_the_new_bus_relations>),
particularly when multiple buses may be at different points within the
route when the opening_hours status changes from one to the other. *Should
the time be based on when the first and last bus on the variant leave from
the starting point or when there is the first difference between the two
routes *(like the first time that the bus stops at one bus stop instead of
another)? I tried to do some searching on the wiki, the old and new help
forums, and the web in general, as well as looking at the guides on the
wiki pages for public transit, the route relation page, and the buses page,
but I was not able to find any specific advice on how I should map the
hours (and I wasn't able to find a specific switch time from my transit
agency either).

For reference, the bus route I am referring to initially departs the
starting stop at 05:25, arriving at the first different stop at 05:53. Each
bus on this route continues to depart for the variant until the last one
(in the morning) on the variant leaves at 07:55 and arrives at the first
different stop at 08:23, ultimately reaching the final destination stop at
08:37. However, before that bus has arrived at the stop, the next bus on
the route switches to the non-variant form of the route and departs at
08:10, reaching the first different stop at 08:42. It then continues on
this route until the last bus (in the afternoon) on the main route departs
at 15:34. The variant bus then departs at 15:46, running until the final
variant bus (of the entire day) departs at 16:58, reaching its destination
at 17:40. The main route bus departs again at 17:10 and continues until the
last one on this route departs at 23:00 and finally reaches its destination
at 23:35. For anyone wishing to look at this route themselves here is the
master relation <https://www.openstreetmap.org/relation/4271833> and here
is my transit agency's schedule <https://www.cata.org/schedules/01/1>.

Thank you,
Aenet
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