6
ERDC/CRREL SR-02-1
being bare pavement as soon as possible and practicable after the storm is over.
Salting may be augmented with a liquid or solid anti-icer and/or deicer as neces-
sary to reach the mission objective. Normally rock salt alone is effective only
down to 22 F, while additives may increase effectiveness down to 0 F. Further-
more, with rock salt pre-wetted with calcium chloride liquid, 90% of the material
stays on the road, whereas only 70% of the non-pre-wetted rock salt stays on the
road.
Sand should not be used on paved road except during icy conditions below
22 F (0 F if the salt material is pre-wetted). Sand must be used on non-paved
roads to alleviate slippery conditions, especially where grades exceed 3%. An
acceptable accumulation of snow on these roads would be two inches. A maxi-
mum average accumulation would be three inches. When the accumulation
reaches four inches, snowplowing operations must begin and must continue until
the storm stops and the roads have been plowed clean. Always plow with the
storm. At no time is a Type-X road closed to traffic, except for severe weather,
including temporary snow or flooding.
Class B
Alternate routes and those with steep inclines. These also are Type-X roads
and include school bus routes as well as those providing access to emergency
medical facilities. These routes should be continuously plowed except when
prolonged storms may affect the ability of truck/snowplow drivers to operate
safely. If a serious concern for safety should arise, operations should cease for a
period not to exceed four hours. Salt and salt with enhancers should be applied as
necessary on all roads designated as salt routes with the mission objective being
bare pavement as soon as possible after the storm.
On non-paved roads the mission objective should be to provide sufficient
sand to ensure reasonably safe driving conditions. During heavy snowfalls that
could render sanding ineffective, sanding operations can be suspended until such
time that the application of sand is effective. An acceptable accumulation of
snow on these roads is two inches. The maximum average accumulation of snow
must not exceed four inches.
Class C
These are Type-Y routes under STANAG 2174 and may not permit
maximum-capacity traffic. These secondary roads and streets carrying light
traffic should be plowed continuously during snowstorms to keep roads as clear
as possible. During major storms it may not be possible to give these roads
Previous Page
