IMHO There is a much better way to achieve that: http://wiki.openstreetmap.org/wiki/Relations/Proposed/Bridges_and_Tunnels this one won't break the verification programs (and probably routers) and although it's not used often, at least it is documented.
regards m. On Fri, Jul 19, 2013 at 9:26 PM, André Pirard <a.pirard.pa...@gmail.com>wrote: > On 2013-07-18 18:26, Marc Gemis wrote : > > Since there are more people on this mailing list than on the forum, I'll > forward a question (with his permission) from the forum: > > The way is in Mont-Saint-Guibert. It seems like someone was trying to > map a bus route by duplicating all roads. > > > I once wrote a message called SEGMENT to tagging@osm saying that it's the > way we should do it. > Instead of making 2 splits in a road to make a bridge and have 3 segments, > leave the road alone and add the bridge as a small second segment under the > road (yes, contrary to OSM belief, bridges are under roads and not on top). > Instead of having a walk or bus route split the roads in every place > because it enters and leaves them, leave the roads alone and make > additional ways for bus routes or walks sharing the road nodes. > > Unfortunately, human kind loves to choose the complicated methods. They > prefer to split roads abundantly and then to reassemble the pieces with > hard to maintain relations. And programs are trying to simplify > difficulties that should be simplicity. My message had not a single reply > and I don't want to fight human kind. I split, split, and split so that if > a mistake has to be corrected like the name of a road, a second mistake has > to be corrected too, and a third one, and oh yes, there's a forth one. And > you overlook the fifth one. > > Cheers, > > André. > > _______________________________________________ > Talk-be mailing list > Talk-be@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-be > >
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