Put the sidewalk tag on the road, and put some indicator on the footway (I use adjacent=yes) that it's also covered by tagging on the adjacent way.
The worst that happens is some router gets two parallel links in their network, or that some super-clever algorithm identifies two parallel sidewalks but doesn't have the wit to work out that they're identical. _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
