As the topic implies:
Now, setting aside the fact that such a thing is potentially quite dangerous, it is a real thing I’ve seen on a couple of quieter residential roads around Longueuil, Quebec. Usually, this is a short distance and connects to a proper sidewalk or shared foot/bike path on each side.
For instance, the one in this photo covers the short section of road I’ve ‘represented’ via a router: OpenStreetMap
Around here we usually tag separate ways such as sidewalks separately, but elements painted onto the road (such as bike paths with no separation) are tagged as part of the road. In either case, a quick trip to the wiki didn’t turn up anything…any ideas?
) and that’s probably where the confusion stems from, but the arguments in favor seem convincing enough to tag it as such.