Tag Archives: Wabash National

Rationale for Republican Support of STOP Underrides Bill

I was glad to see that John Gallagher (FreightWaves) highlighted an aspect of the STOP Underrides 2.0 Bill which should be of interest to industry and Republicans:

In an effort to address long-standing complaints from the trucking industry that underride protection equipment adds weight and increases fuel costs, the new bill includes a performance standard whereby any new side underride guards must “contribute to fuel efficiency through the integration of aerodynamic design or components furthering fuel efficiency.” The provision is aimed at offsetting the operational costs of the guards by essentially requiring them to function as side skirts. Legislation would require crash protection on new trucks

However, in his description of the new bill, he also mentions that prior versions included a retrofit requirement which is not in the 2026 legislation. While it is true that previous versions of the bill, in 2017 and 2019, contained a retrofit requirement, we decided to remove that provision in the 2021 re-introduction of the STOP Underrides Bill. We did that not because we no longer thought it beneficial for the saving of lives but in order to garner broader Republican support.

Thankfully, we already had the support of Senator Marco Rubio, who had co-led underride legislation with Senator Kirsten Gillibrand since it was first introduced in 2017:

“Hundreds of individuals across the nation are lost to underride collisions every year, with Florida unfortunately ranking among the top states for reported fatalities,” Rubio said. “As a parent with kids of driving age, I look forward to working in a bipartisan fashion to advance efforts to make our roads safer.” Senators Kirsten Gillibrand and Marco Rubio introduce bill to prevent truck underride deaths

In fact, we had been in discussions with Senator Richard Burr, our Republican Senator in North Carolina since August 2013 just a few months after our crash. We continued discussions with his staff over the years and in 2021 knew that he would become an original cosponsor if we removed the retrofit requirement.

You see, he wasn’t shortsighted; he saw the big picture. He knew that strong underride regulations would be a Win/Win situation—good for victims of truck crashes because they would have a better chance of surviving but also good for business when all relevant factors are taken into account.

Although Senator Burr has retired and can no longer support this legislation, I hope that his former colleagues will see the light and follow in his footsteps. To that end, I have held ongoing conversations with the Offices of our current North Carolina Senators, Thom Tillis and Ted Budd — keeping them updated on the underride crash testing which we have conducted in Raleigh.

Likewise, I’ve had conversations with Republican staff of the House T&I Committee and Senate Commerce Committee, as well as many other Republican legislators, including Senator John Thune (former Chair of the Commerce Committee), Senator Ted Cruz (current Chair of the Commerce Committee), and Senator Todd Young, who represents Indiana where three trailer manufacturers are headquartered. One of them, Wabash Trailers, proudly announced their improved rear underride guard in 2016 and showcased their side guard prototype at a trucking conference in 2017 — although they are, regrettably, not installing them on their trailers at this time.

Since we no longer have Senators Rubio and Burr to champion underride protection, I would be beyond delighted if these sitting Senators would choose to lead the way in strong Republican support of this common-sense legislation.

Critique of NHTSA-Contracted Elemance Rear Impact Guard Research

Secretary Duffy,

The Department of Transportation (DOT) engaged Elemance LLC in 2022 to evaluate three current designs of rear impact guards. Unfortunately, Elemance conducted Finite Element analysis of two obsolete rear underride guards that were not current designs at the time of the contract. In fact, both of those designs had been proven a decade earlier to be crash-deficient. The two manufacturers — Great Dane and Wabash — have developed designs with safer, stronger rear-guard designs. Elemance compounded that error by employing an erroneous definition of Passenger Compartment Intrusion. Elemance’s research findings, Heavy-Truck Rear-Impact-Guard Finite Element Simulation and Analysis, are flawed and backwards-looking rather than helpful to the Department and Congress in evaluating current and future rear underride guard performance and regulatory standards.

Please find attached a detailed critique by engineers who are well-acquainted with the underride problem and solutions. This is what the engineers concluded about the NHTSA-contracted research:

In view of the defects in the Elemance report, a follow up study should be commissioned to evaluate examples of current state of the art rear impact guards that have been in service since 2016 and 2017 respectively. The study should utilize the correct definition of PCI and more accurately assess injury risk.

The Department should act promptly to address the flaws in this federal research in order to fulfill its mission to reduce roadway injuries and deaths.

Jerry and Marianne Karth

Note: This critique was submitted as a Public Comment on September 3, 2025, to the U.S. Department of Transportation in response to their Request for Comments on priorities for the 2026 Surface Transportation Reauthorization.

This video created by the Insurance Institute for Highway Safety twelve years ago explains their Rear Impact Guard crash testing research and how the federal standard is failing to protect road users:

This video is a compilation of IIHS Rear Impact Guard crash tests with old and new guard designs for many of the major trailer manufacturers:

This video demonstrates the night & day difference between old and new designs by one manufacturer:

Wabash Engineer Left a Valuable Legacy: A Side Underride Guard Patent

In November 2017, Lois Durso and I were privileged to meet the inventor of this design –Wabash engineer, Rod Ehrlich — along with his son Mark Ehrlich, who have been a vital part of this important research. Rod died in October 2018, after a long career of useful contributions to the trailer industry — including more than 60 patents, and most recently a side underride guard patent.

Wabash National continues their side underride protection R&D, as evidenced by a side underride guard patent filed on April 17, 2018, and issued on February 4, 2020. The prototype was introduced in a September 2017 commercial vehicle show in Atlanta.

“A side underride system configured to be coupled to a trailer may comprise a first skirt wall coupled to the trailer, positioned below a first side wall of the trailer, and extending along a first length of the trailer between a skirt wall front end and a skirt wall rear end and a cable system including a first cable coupled to the trailer, positioned below the first side wall, and extending along a second length of the trailer between a cable system front end and a cable system rear end, the skirt wall rear end being positioned forward of the cable system rear end.” https://patents.justia.com/patent/10549797

Wabash 2020 SUG patent (1)

In fact, we were able to see a successful crash test of his design. As evidenced by Rod’s work, along with that of many other engineers, this country has the talent to bring about effective solutions to deadly underride. Unfortunately, the lack of a mandate is holding the trucking industry back from moving forward with tangible action to once and for all get it on the road.

Let’s grab the baton from Rod’s legacy. Surely we can put our heads together and reach the finish line in the long-standing pursuit of that elusive goal: underride protection on the sides of all large trucks so that we might save lives and prevent horrific injuries.

Lois Durso-Hawkins, Atlanta TMC Conference, March 2018
Wabash side impact guard prototype, March 2018, Atlanta TMC Conference