Daniel, if you look at the motorway_link page in the wiki ( http://wiki.openstreetmap.org/wiki/Motorway_link) you'll see that by default it implies oneway=yes. That would explain the behavior you described.
"Most motorway_link roads will be one way, and should be tagged oneway<http://wiki.openstreetmap.org/wiki/Key:oneway> =yes <http://wiki.openstreetmap.org/wiki/Tag:oneway%3Dyes>. Any unusual motorway link road which is two-way should be explicitly tagged oneway<http://wiki.openstreetmap.org/wiki/Key:oneway> =no <http://wiki.openstreetmap.org/wiki/Tag:oneway%3Dno>. Note that this is different to the way we treat other highway classifications, because motorway link roads are so often one way. Explicit tagging (either way) can be important, since *some* tools interpret motorway link roads as implicitly oneway=yes unless tagged oneway=no." I wonder if there would be a way to filter all those links that are reversed with the Overpass API? Harald. On Mon, Nov 25, 2013 at 2:40 PM, Daniel Begin <jfd...@hotmail.com> wrote: > Bonjour, > > > > I’ve just found out that I have routing troubles with OSM data in a Garmin > GPS when motorway_link are not tagged oneway=yes/no. Here is an example > where some segments of motorway_link can be driven both ways (2 lanes, one > each side) > > > > http://www.openstreetmap.org/#map=16/46.0194/-72.3512 > > > > Everything works fine when tags are… > > highway=motorway_link > > oneway=no, or > > oneway=yes > > > > But it doesn’t work if there is no oneway tag. Actually, the way must have > been digitized in the direction I want ot go – as if it assumes that no > oneway tag means oneway=yes. In the provided example, my GPS will find a > way out of the motorway but it will not find a way in! - must be looked at > in an editor. > > > > It could have been my usual OSM/Garmin provider ( > http://www.osmmaps.com/maps/canada ) but when I saw the same behavior in > JOSM I wonder if there is a rule I’m not aware of? Should I change my > OSM/Garmin provider or tell him there is a problem with his conversion > program? > > > > Comments or answers? > > > > Daniel > > _______________________________________________ > Talk-ca mailing list > Talk-ca@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-ca > > -- Please use encrypted communication whenever possible! Key-ID: 0x34cb93972f186565
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