@article{ref1,
title="Thrie-beam guardrails for school and intercity buses",
journal="Transportation research record",
year="1982",
author="Ivey, Don L. and McDevitt, Charles F. and Robertson, Richard and Buth, C.Eugene and Stocker, Arthur J.",
volume="868",
number="",
pages="38-44",
abstract="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>",
language="en",
issn="0361-1981",
doi="",
url="http://dx.doi.org/"
}