Hi, Sebastian from Wheelmap here :) I’d suggest using wheelchair=limited, even if Wheelmap doesn’t show ways (yet). This way the traffic light scheme would continue to work for these trails.

The tag isn’t enough though: I’d +1 that the following tags would be essential and helpful for any kind of accessible routing:

• osm.wiki/Key:width
• osm.wiki/Key:smoothness
• osm.wiki/Key:surface
• osm.wiki/Key:incline
• osm.wiki/Key:tracktype
• osm.wiki/Tag:highway%3Dsteps

I can’t say exactly when Wheelmap is going to support these, but it’s certainly on our ideas-for-the-future list.

To see why these detailed tags can make a big difference, https://www.accessmap.io is a good proof of concept of different routing profiles. The app shows that detailed tags are more valuable than making assumptions about a single user’s needs – that’s something we learned when we designed A11yJSON: If you can, describe physical objects, not people.