[Tagging] surface=gravel problems
adamfranco at gmail.com
Thu Apr 29 01:53:39 UTC 2021
> 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
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."
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