Thanks for starting this conversation with a wiki document to aid in the discussion.
One of the statement in the wiki "How to handle situations where the kerb is not identical on both sides of the sidewalk (however: probably a rare case. In this case the worst value could be tagged)?" doesn't fit with my experiences. My experience from in living in big cities and small towns is that kerbs are not always the same on both sides of the street. Certainly not rare. Big cities often have kerbs on both sides the closer you get to the center of the city. The further way then kerbs seem to be optional. Like sidewalks, kerbs could be assigned to the road as in both/right/left/none. But that doesn't solve the problem of crosswalks. Since crosswalks are nodes, it is impossible to tag one side as wheelchair accessible while the other side isn't. The proposal to add a kerb node to the footpath works, but that leaves out the remainder of the road. Which might indicate that it would acceptable for a wheelchair to cross in the middle of a road. (It is probably a silly assumption on my part.) A better approach might be to assign kerbs to road and add a node to the footpath indicating the type of kerb at the crosswalk. Clifford -- @osm_seattle osm_seattle.snowandsnow.us OpenStreetMap: Maps with a human touch
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