<i>The current revision of one specific model of</i> highway guardrail may be deadly. FTA:<p><i>“Even though it appears that the ET-Plus terminal can still meet crash testing requirements,” the draft said, “the number of highway crashes with fatal injuries involving the ET-Plus terminal does not match the excellent history of the original ET-2000 terminal.”</i>
Could be another reason for increased usage of the alternate cable barrier design: <a href="http://en.wikipedia.org/wiki/Cable_barrier" rel="nofollow">http://en.wikipedia.org/wiki/Cable_barrier</a>