Coordinate surface tagging on roadway and crossing about sidewalks HOT 2 OPEN

That's totally reasonable. I'll try and pay attention and see if there are any unambiguous cases but it does seem to be tricky.

from sidewalks.

This is a harder problem to solve.
Yes, I could do that (and it might make sense for crossings without a surface tag), but I would not want to copy a conflicting surface tag over.

Realistically, I can justify copying the surface tag from a highway to the crossing on crossing creation -- the user is more likely to fix the surface data at that time.

Copying the surface tag from the highway to the crossing after the fact is a bit harder to justify. I'd rather have the user look at each crossing individually, instead of mass editing crossings.

I'd rather have no information than wrong information, and I think it is substantially more likely for that to happen when copying surface data from a highway to a crossing when adding the surface to a highway.

In other words, a validator rule would be more appropriate.

EDIT: Removing surface tagging when changing a highway surface might be appropriate though.

from sidewalks.