[Tagging] Feature Proposal - RFC - Obstacle

[Martin Koppenhoefer]

I'd suggest some additional values:
* rockfall = some rocks have fallen onto the road
* guardrail_broken = there is a hole in the guard rail or in a
retaining wall alongside the road (i.e. you might fall)

Not sure if the latter is really an obstacle, it is a danger element
but as it is on the side of the road it will usually not obstruct the
road itself.

cheers,
Martin