U.S. highway guardrail systems made by Trinity Industries Inc. and Road Systems Inc. have “safety performance issues” in some real-world crash scenarios, the Federal Highway Administration said as it urged a national overhaul of standards to better protect American drivers.
The regulator Friday released a report citing “performance limitations” of five guardrail products, three by Trinity and two by Road Systems. The agency found the models experienced performance shortcomings in side impacts and shallow-angle collisions with the guardrail’s end, sometimes resulting in penetration of the vehicle.
Trinity has faced scrutiny over the past year after a jury faulted it for not disclosing changes to its ET-Plus guardrail system about a decade ago. In June, the federal judge presiding over the lawsuit said the company must pay $663 million.
The ET-Plus was designed to serve as a roadside shock absorber that mounts onto the ends of guardrails. More than 20 lawsuits allege Trinity’s revised version jams when hit, penetrating crashing cars instead of helping slow them. About 200,000 of the units are installed along U.S. roadways, the FHWA has said. Trinity’s modified ET-Plus has been tied by plaintiffs’ lawsuits to at least nine deaths.
In March, the FHWA gave a passing grade to the ET-Plus after a series of eight crash tests under older safety standards.
In Friday’s report, the FHWA and a coalition of state highway officials recommended nationwide adoption of more stringent safety criteria for newly installed highway devices, so as to screen for some of the identified vulnerabilities.
The report’s authors selected 161 crashes for detailed analysis, with a focus on instances involving fatalities, major injuries, rollovers, and severe outcomes including penetration of the vehicle.
All but 22 of the crashes involved a guardrail system made by Trinity. In 71 of those cases, the reviewers were able to identify the system in question as a modified ET-Plus, the agency said. Performance limitations resulted both from the nature of the crash as well as installation flaws, according to the study.
In some of the crashes, the guardrail pierced the vehicle, and in others, caused the car to rollover or decelerate suddenly. The authors said they didn’t have enough data to compare the relative safety of the different guardrail systems, but they were able to conclude that performance issues were not limited to the modified version of the revised ET-Plus.
The regulator conceded that its tests couldn’t cover all potential crashes, and that many factors can affect guardrail performance in the field.
Virginia’s transportation department has said it will sponsor its own set of crash tests of the ET-Plus starting later this month. Two of the tests involve a vehicle hitting the end of the guardrail at a slight angle, which is one of the vulnerable scenarios identified by the federal report.