Hi everybody, I'm sure this has been discussed in length before, but I cannot seem to find a good way to search the archives. Anyway, I will present my thoughts here and you can respond or be quiet :)
I'm trying to fix at least two issues I have. a) A way that is sort of one-way but allows buses and taxis in the opposite direction. Don't know how to tag them, currently I've just ignored buses and taxis and tagged them oneway=yes. b) 2+1 ways as we call them in Sweden, they are normal ways but have a small fence in the middle and 2 lanes on one side and 1 lane on the other side. They look like this: http://www.vv.se/filer/Vägprojekt/3-Falt.jpg Now, I want a good way to tag them, and using lanes, you can maybe say lanes=3, or lanes=2+1, lanes=2,1, lanes=1+2, lanes=1,2, ... but how to interpret that. I'd rather not resort to mapping these as two ways, as they are in effect one way, just preventing head on collision. They have crossings like a normal road, no ramps, acceleration fields, etc. I would like a more general mechanism, but yet simple. I propose something like this forward:lanes=2 backward:lanes=1 (for the sake of the renderer you could also specify lanes=3) The forward: and backward: prefix potentially applies to any key on a way (because it needs direction. So, a) above would be oneway=yes (or backward:access=no), backward:psv=yes, lanes=1. There are a few directional tags already in osm: oneway=yes would be equivalent to backward:access=no cycleway=opposite_lane would be equivalent to backward:cycleway=lane footway=both/left/right/none would be [forward:/backward:]footway=lane/yes etc The advantage of having a simple tagging mechanism like this is that the editors can easily prevent accidental reversal of a way, like josm does right now with oneway. There are probably other uses for this kind of scheme. And it doesn't really fit into a relation either. Thanks, Martin _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
