@article{ref1,
title="Impact behavior of small-highway-sign supports",
journal="Transportation research record",
year="1979",
author="Ross, Hayes E. and Walker, Kenneth C. and Lindsay, W. J.",
volume="736",
number="",
pages="52-58",
abstract="The results of a series of tests conducted to evaluate the impact performance of widely used and promising new support systems for small roadside signs are presented. All systems were single-post installations. Tests were conducted in accordance with current nationally recognized guidelines, and results were evaluated in terms of American Association of State Highway and Transportation Officials performance specifications. It is concluded that, with the advent of smaller vehicles, small, single-post roadside sign installations can no longer be considered an insignificant hazard. In the tests, many currently used support systems proved acceptable by current performance specifications whereas others were shown to be totally unacceptable and some were what can be termed marginally acceptable. Support systems with breakaway or fracture mechanisms performed much better than base-bending or yielding supports.<p />",
language="en",
issn="0361-1981",
doi="",
url="http://dx.doi.org/"
}