[Tagging] surface=gravel problems

[Adam Franco]

> Googling ”engineer reconnaissance” turns up several hits, though the
> relevant chapter seems to be number 4 in the more recent ones.
>

Reading through chapter 4
<https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/ATP%203-34x81%20C1%20INCL%20FINAL%20WEB.pdf>
there were a lot of military-use specifics (makes sense), but the
route-type sounds like a formal definition of what Bert has been saying
about weather-dependent classifications:

"(2) Route Type 4-  10. The route type is determined by the ability to
> withstand weather.  It is determined by the worst section of road on the
> entire route and is categorized as follows:
>
>    - *Type X*. An all-weather route that, with reasonable maintenance, is
>    passable throughout the year to  a  volume  of  traffic  never  appreciably
>     less  than  its  maximum  capacity.  This  type  of  route  is  normally
>     formed  of  roads  having  waterproof  surfaces  and  being  only
>     slightly  affected  by  rain,  frost, thaw, or heat. This type of route is
>    never closed because of weather effects other than snow or flood blockage.
>    - *Type  Y*.  A  limited,  all-weather  route  that  is  passable
>     throughout  the  year  with  reasonable maintenance,  but at times has a
>    volume of traffic considerably less than maximum capacity. This type  of
>     route  usually  consists  of  roads  that  do  not  have  waterproof
>     surfaces.   The  route  is considerably affected by rain, frost, thaw, or
>    heat. This type of route is closed for short periods (up to one day at a
>    time) by adverse weather conditions during which heavy use of the road
>    would probably lead to complete collapse.
>    - *Type  Z*. A fair-weather route is  passable only in fair weather.
>    This type of route is so seriously affected by adverse weather conditions
>    that it may remain closed for long periods. Improvement of such a route can
>    only be achieved by construction or realignment."
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tagging/attachments/20210428/7ac7b580/attachment-0001.htm>