In October 2014, Trinity Highway Products, LLC (Trinity Highway) was asked by the Federal Highway Administration (FHWA) to retest the ET Plus® System to National Cooperative Highway Research Program (NCHRP) Report 350 criteria.
FHWA reviewed and accepted the retest work plan submitted by Trinity Highway. The test plan is available on the FHWA Guardrail Safety website.
In December 2014, retesting of the ET Plus® System began. The tests were conducted at the Southwest Research Institute (SwRI) an independent, FHWA-approved testing facility in San Antonio, Texas. This facility has not participated in any previous tests of the ET Plus® System and has no financial interest in the product.
FHWA engineers, representatives from the American Association of State Highway and Transportation Officials (AASHTO), interested state DOT representatives and media representatives from a media selected “pool” were present at the testing.
ET Plus® System 27 3/4” Results:
The Federal Highway Administration (FHWA) released the first four crash test results conducted at the 27¾” installation height of the ET Plus® System. These tests passed and comprise the first series of the FHWA requested National Cooperative Highway Research Program (NCHRP) Report 350 tests. The 27¾” height system accounts for a vast majority of the ET Plus® Systems installed on highways nationwide.
ET Plus® System 31” Results:
The FHWA released results for the final four crash tests of the ET Plus® System, confirming all four tests passed. The four tests were conducted at the 31” installation height and are the final four of eight tests requested by the FHWA last October.
Link to Test Results Released by the FHWA