[Tagging] RFC - Hazards - 2 Week Update & RFC Summary

[Paul Allen]

On Wed, 9 Dec 2020 at 14:26, Brian M. Sperlongano <zelonewolf at gmail.com>
wrote:

> I have found examples of both falling rock[1] and fallen rocks[2] on
> signage and it's not clear to me which is the more common.
>

The UK signage for this hazard doesn't have text.  But the explanation of
the
signage in the Highway Code says it warns of "Falling or fallen rocks."  See
https://www.highwaycodeuk.co.uk/warning-signs-on-the-road.html
and search for "falling".

In that same document, just above the falling/fallen rocks sign is the
aircraft sign which it says warns of "Low-flying aircraft or sudden
aircraft noise".
Low-flying aircraft will often cause a sudden aircraft noise, but a
high-flying
supersonic aircraft can generate a sonic boom (but these are rare and if
they occur they are not likely to be predictable as they will usually be
the result of an emergency).

I'd suggest fallen_rock and low_flying_aircraft as tag values based upon
the common case but have the proposal mention their secondary application.

I think there may be other hazard warning signs in that document for you to
consider.

-- 
Paul
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