
45
QuadGuard
®
cz
Limitations
Limitations
Limitations
Limitations
Limitations And
And
And
And
And W
W
W
W
Warnings
arnings
arnings
arnings
arnings
The 6 bay QuadGuard
®
cz has been tested and evaluated
per the recommendations of the NCHRP 350 Guidelines*
for Test Level 3 (TL-3) terminals and crash cushions. The
impact conditions recommended in this guideline are in-
tended to encompass the majority but not all, of the pos-
sible in-service collisions.
Properly installed and maintained, the QuadGuard cz is
capable of performing its function of stopping or con-
taining and redirecting the test vehicles in a predictable
and safe manner under the nominal NCHRP 350 TL-3
terminal and crash cushion impact conditions of:
Vehicles: Small car and pickup
Mass: 820 and 2000 kg [1808 and 4409 lb.]
Speed: 100 km/h [62 mph]
Angle: 15 degrees for small vehicle
20 degrees for pickup
Impact conditions which differ from those described in
NCHRP 350 test matrix for non-gating, redirecting crash
cushions may result in different crash results than those
encountered in testing. Furthermore, impacts in excess
of TL-3 impact severity, or the existence (at the site of
the installation) of curbs or cross slopes in excess of 8%
may yield crash performance which does not meet
NCHRP 350 evaluation criteria relative to structural ad-
equacy, occupant risk and vehicle trajectory factors.
* Copy may be obtained from:
Transportation Research Board
National Research Council
2101 Constitution Avenue, N.W.
Washington, D.C. 20418
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