The federal agency that a court found was misled and defrauded by a leading guardrail company is taking a hard look at whether the company's guardrails -- some of the most widely-used on America's roads -- should continue to protect American drivers. "The Federal Highway Administration [FHWA] will evaluate the findings of the Trinity case and consider whether it affects the continued eligibility of the ET-Plus guardrail end terminal," Department of Transportation spokesperson Brian Farber told ABC News in an email late Monday evening.