"Check its presence in our test cases before you try it out. ;-) " Are you saying here that this is not an excepted tagging schema? I would love this to be true as oneway=yes drives me nuts especially as I know the fringe cases where this is not the truth for many of the ways tagged as such.
Regards, Nathan P email: [email protected] On Mon, Apr 27, 2020 at 11:34 AM Michael Reichert <[email protected]> wrote: > Hi, > > Am 20/04/2020 um 16.26 schrieb [email protected]: > > I have read https://wiki.openstreetmap.org/wiki/OpenRailwayMap/Tagging > but I'm a bit confused about how to know if a track can be used in both > directions. > > For a given way, should I rely on the value of the key oneway and on the > value of the key railway:bidirectional ? > > And I'm confused about the description of the value "possible" for the > key railway:bidirectional. Does it mean a way with that value may be > bidirectional or not ? > > TL;DR If you need the direction of a track for routing purposes, use > railway:preferred_direction=*, and oneway=* as fallback. > > There are a couple of tags regarding the preferred or usual direction of > traffic on a track. > > oneway=* is odd in railway context and I would not use it at all because > in almost any case a track can be used in both directions— often with > limited safety (see below). Most usage of oneway=* on railway track is > wrong. > > railway:preferred_direction=forward/backward/both indicates whether the > primary direction of traffic the track is intended for is forward, > backward or in both directions. This tag is used outside a station on > double-tracked railway lines (both is common in stations and on > sigle-track lines). That's what I would use for routing. This tag is > used a lot in France (at least the eastern half) and a bit in Germany > and elsewhere. Check its presence in our test cases before you try it > out. ;-) > > railway:bidirectional=* indicates the safety level of trains running > against the usual direction on double-track lines (the tag is intended > for the usage outside a station). > > railway:bidirectional=regular means that the same safety level w.r.t. > interlocking is available, i.e. the interlocking in the signal box > ensures that no other train is on the segment ahead. > > railway:bidirectional=signals means that there are signals for trains > using the track against the regular direction but there a limited or no > mechanisms in the interlocking to ensure that the track ahead is free. > > railway:bidirectional=possible means that there are no signals and no or > nearly no safety mechanisms in the interlocking for trains running > against the regular direction. These trains usually need some kind of > manual command by the dispatcher (written sheet of paper, a phone call > or similar depending on the rules of operation). There are no or nearly > no mechanisms ensuring that the track ahead is free, all safety relies > on the staff at the signal box. > > Best regards > > Michael > > _______________________________________________ > Openrailwaymap mailing list -- [email protected] > To unsubscribe send an email to [email protected] > %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
