Am Montag, 4. Januar 2021, 10:36:10 CET schrieb Natfoot:
> Rolf,
> Thanks for the quick reply.  I think I am confused by the ISO symbolying
> that is suggested to be used in the value location of these attributes.
> Though I could be wrong.
>
> https://wiki.openstreetmap.org/wiki/Key:railway:signal:distant
> States:"only light and semaphore signals railway:signal:distant:states
> <https://wiki.openstreetmap.org/w/index.php?title=Key:railway:signal:distant
> :states&action=edit&redlink=1> =* – displayable signal apsects (e.g. stop,
> proceed, proceed at low speed, …). The value should begin with a
> country-operator-prefix, e.g. DE-ESO: or AT-V2"
>
> additionally in this email from the archive
> https://lists.openrailwaymap.org/archives/openrailwaymap/2015-July/000311.ht
> ml
>
> "...the aspects of signals can show the following:
>
> - main: Hp0, Ks1
> - distant: Ks1, Ks2"
>
> There is no chart I could find with these ISO codes or any other
> documentation I could find.

This state list could predate the mandatory prefix, I remember that this was
changed and we did a lot o retagging to make sure the values are unique
worldwide.

So in Germany the values ending at 0 are "stop",1 is "pass", and "2" is "pass
slowly" or "expect stop". There are multiple signalling systems around, but
that is what they have in common. For the oldest system (H/V) the main aspects
are named Hp, and the distand aspects are named Vr. As a distant signal can
only show what the main signal has this means:

main: DE-ESO:hp0;DE-ESO:hp2 (stop, pass slowly)
distant: DE-ESO:vr0;DE-ESO:vr2

As a bonus the stop aspect is named "hp0" in all signalling systems, so you
may as well see "DE-ESO:hp0;DE-ESO:ks2", meaning "stop" and "expect stop".

The H/V hp2 is a "pass slowly" aspect, if not noted with an additional speed
signal means 40km/h. The Ks2 aspect means "expect stop", all speed regulations
are explicitely signalled in this system.

Eike