Proposal for sidewalk tagging
We (the Italian community, or at least people on #osm-it@oftc) more or less like the first proposal linked above but don't like the other two: it's an abuse of the "footway" name (remember, what's a "farm" now on OSM? We risk that same thing with the term "footway"), and, especially the third one, is, in our opinion, poorly conceived.
To specify that the street has a sidewalk, use
If the sidewalk diverges from the street, it should be mapped as a separate way, using highway=footway. If it is physically segregated from the street, i.e. a pedestrian can't go in the middle of the street without jumping :), it should have a "barrier" subtag. See the section below.
If the sidewalk also hosts a cycleway, please also use the appropriate cycleway=*.
In the following table, side is one of (left|right|both). When side is both, it's possible to skip :side.
|sidewalk:side=(raised|ground|lane)||Describes whether the sidewalk is raised above the street level, or is just at the same level (ground), or lies within the roadway and it's only delimited by markings (lane).|
|sidewalk:side:wheelchair=*||Describes the conditions for wheelchairs.|
Every value described in wheelchair=* is suitable.
|sidewalk:side:barrier=*||Describes whether the sidewalk is physically segregated from the street, and how.|
Unlike the above wheelchair, not every value described in barrier=* is suitable. Accepted values are: hedge, fence, wall, bollard, block, chain. As you can see, this is a subset of barrier=*: if you need one of the others, you're tagging a footway, and this proposal is not for you.
|sidewalk:side:barrier=*||When tagged as a node, this tag means something a barrier transversal to the sidewalk, rather than alongside the street.|
Every value described as a node barrier in barrier=* is suitable.
|sidewalk:side:surface=*||Describes the surface of the sidewalk.|
Every value described in surface=* is suitable.
|sidewalk:side:width=*||Describes the width of the sidewalk. The unit is meters unless otherwise specified.|
Please use the talk page.