TY  - JOUR
PY  - 1982//
TI  - Thrie-beam guardrails for school and intercity buses
JO  - Transportation research record
A1  - Ivey, Don L.
A1  - McDevitt, Charles F.
A1  - Robertson, Richard
A1  - Buth, C.Eugene
A1  - Stocker, Arthur J.
SP  - 38
EP  - 44
VL  - 868
IS  - 
N2  - The results of full-scale tests that were conducted to establish the upper performance limits of conventional W-beam guardrail and Thrie-beam guardrail systems are described. The tests showed that these conventional guardrail systems cannot safely redirect a 9070-kg (20000-lb) school bus in a 15 deg angle impact at 96.5 km/h (60 mph). The development and evaluation of a modified Thrie-beam guardrail are also described. A series of full-scale tests had demonstrated that the unique feature of this guardrail system, a special 0.36-m (14-in) deep blockout, not only prevents the wheels of mini-compact cars from snagging on the posts but also raises the rail during impact to stably redirect heavier vehicles such as school and intercity buses.<p /> <p>Language: en</p>
LA  - en
SN  - 0361-1981
UR  - http://dx.doi.org/
ID  - ref1
ER  -