the woods. However, construction vehicles will be allowed to travel on unstabilized
trails. Any construction "trick" learned from the wooded trail should be used
when building these test sec-
The construction and perfor-
mance of 5 of the test sections
will be evaluated by building
a pentagonal test section of
100-ft sides with the test sec-
tions centered on the corners
as shown in Figure F4.
Construction of each of the
test sections must be evaluated
Figure F4. Corners test section.
according to the evaluation
form provided at the site. As
we are trying to assess the suitability of these materials for the Army, be sure to
include the National Guard evaluator's opinion and comments pertaining to the
After all test sections in an area have been built, the test road will be traversed
by a single pass of a pickup truck or similar utility vehicle. Then each of the test
sections will be trafficked 50 passes with a M1 and then 50 passes with a HEMTT--
both fully loaded. The M1 and driver will be provided by Fort McCoy (via
Kerkman). The National Guard unit will provide the HEMTT with driver. The
HEMTT tire pressure should be set as follows: axles 1 and 2 at 20 psi, and axles 3
and 4 at 30 psi. If the ground is frozen, the tire pressures should be axles 1 and 2 at
35 psi, and axles 3 and 4 at 40 psi. The drivers should be aware of the vehicle
performance and differences among the test sections and will complete evalua-
tion forms. The driver should try to keep a constant vehicle speed over all the test
sections (10 to 20 mph), which will be recorded on the evaluation form along with
any speed variation caused by the different test surfaces or deterioration of the
test surfaces. At the end of the M1 and HEMTT trafficking a small utility vehicle
will again traverse the test sections.
Possible delays during this stage include flat tires and vehicles getting stuck.
The slopes will also include a test of the vehicles starting from a stop.