[Tagging] Access=no for bus lanes

[François Lacombe]

Thank you for useful details osm.tagging at thorsten.engler.id.au, I didn't
get things that way before

Then it's ok for access=no, I'll update my parser

All the best

*François Lacombe*

fl dot infosreseaux At gmail dot com
www.infos-reseaux.com
@InfosReseaux <http://www.twitter.com/InfosReseaux>

2018-06-08 12:34 GMT+02:00 <osm.tagging at thorsten.engler.id.au>:

> To be a bit more specific about it:
>
>
>
> All access tags follow the pattern:
>
>
>
> transport mode = access value
>
>
>
> All the different transport modes form a tree, as can bee seen here:
> https://wiki.openstreetmap.org/wiki/Key:access#Land-based_transportation
>
>
>
> “access” is the key used for the transport mode at the root of the tree.
>
>
>
> To find out the effective access value for a specific transport mode (a
> leaf node in the tree of transport nodes) you start at that transport mode
> and check if there is a tag defining an access value, if not, you go to the
> parent in the transport mode tree and repeat the check, until you either
> find a tag (which is then the effective access value) or you checked for
> the “access” tag (the root of the tree) and didn’t find it.
>
>
>
> So if you tag something as e.g.:
>
>
>
> access=no
>
> psv=designated
>
>
>
> and you want to know the access value for e.g. a normal car, you check:
>
>
>
> motorcar -> not found
>
> motor_vehicle -> not found
>
> vehicle -> not found
>
> access=no
>
>
>
> your effective access value for motorcar is no.
>
>
>
> If instead you want to check for bus, you check:
>
>
>
> bus -> not found
>
> psv=designated
>
>
>
> your effective access value for bus is designated.
>
>
>
> If you would tag something (very wrongly) as
>
>
>
> access=designated
>
>
>
> that would mean that any check that reaches the root of the tree would
> result in the access value of designated. Which makes the highway
> designated for every possible type of transport. And anything that's
> everything is nothing…
>
>
>
> *From:* Lionel Giard <lionel.giard at gmail.com>
> *Sent:* Friday, 8 June 2018 19:30
> *To:* Tag discussion, strategy and related tools <
> tagging at openstreetmap.org>
> *Subject:* Re: [Tagging] Access=no for bus lanes
>
>
>
> Yes the idea behind access=* is a general tag - it indicate for every
> other transport types (except if another more specific tag is used) : so
> access=private just say that for every type of transport it is a private
> access, and if you add foot=yes, it became "private for everyone except
> people on foot that can walk freely). There is a hierarchy as shown on the
> wiki where a more specific access tag override restriction.
>
>
>
> 2018-06-08 11:25 GMT+02:00 marc marc <marc_marc_irc at hotmail.com>:
>
> about "Bus-only roads"
>
> Le 08. 06. 18 à 11:00, François Lacombe a écrit :
> > highway=unclassified + access=designated + bus=yes + cycle=yes
>
> access=no + bus=designated (+ cycle=yes and/or taxi in some country)
>
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