Tag Archives: rear impact guards

CMV Safety Summit Showcases Underride Crash Tests

The FMCSA and the Institute for Transportation Research & Education at North Carolina State co-hosted of the Commercial Motor Vehicle 2026 Safety Summit in Raleigh, North Carolina August 10-11, 2026. The organizers invited AnnaLeah & Mary for Truck Safety (ALMFTS) to arrange an underride crash testing demonstration by Aaron Kiefer (Collision Safety Consulting) and a volunteer TEAM Underride Crash Test Crew — as part of the Technology Showcase held at the NC State Highway Patrol training facility on August 11.

Educational resources available to participants at the STOP Underrides/Collision Safety Consulting booth in the Exhibit Hall and the Technology Showcase are provided here digitally:

Here is Video Footage from the Crash Tests:

  • Crash test into the side of a trailer WITH a side impact/underride guard at 39 mph
  • Crash test into the side of a trailer WITHOUT a side impact/underride guard at 40 mph

Media Coverage:

We know this unique opportunity to showcase the technical feasibility of underride protection could not have been accomplished without the commitment to safety evidenced by so many people. We are grateful to the individuals and organizations whose donations made this demonstration of life-saving technology possible — including gifts given in memory of several underride victims, as well as an engineer who made significant contributions to underride research. Additionally, we are thankful to the 25 members of the TEAM Underride Crash Test Crew, who volunteered their time and skills from around the country, as well as the help and resources from the NC State Highway Patrol, AWP Safety, and the Garner Fire Department.

Recent Relevant Research Reports & Recommendations on Side Underride Guards:

Crash Test Into Side of a Trailer with a Side Guard 2026  Crash testing, of a car colliding with the side of a tractor trailer — equipped with a Side Underride Guard — at 39 mph as part of the 2026 CMV Safety Summit in Raleigh, was live streamed on Facebook by a member of the crash test crew from a spectator viewpoint on a hill above the crash course. The windshield was cracked, but the truck did not go past the windshield into the occupant survival space.

Crash Test Into Side of Trailer — No Side Guard 2026 (livestreamed on Facebook) Crash testing, of a car colliding with the side of a tractor trailer at 40 mph as part of the 2026 CMV Safety Summit in Raleigh, was live streamed on Facebook by a member of the crash test crew from a spectator viewpoint on a hill above the crash course. The driver and a front seat passenger would not have survived.

Certified Letters Alert Carriers of Underride Dangers, Liability & Solutions

The fact that truck and trailer designs can potentially allow underride when there are collisions with passenger vehicles has a long history of being misunderstood. With that in mind, on October 12, 2024, we sent letters to two lists of “100 top carriers” in North America via Certified Mail. We wanted their Boards and CEOs to be aware of the September 2024 $462 million verdict in a product liability lawsuit against a trailer manufacturer for failing to install a protective rear guard, leading to two fatalities — indicating that juries will not accept more of these preventable deaths.

“We hope the decision the jurors reached sends a clear message to the trucking and trailer industry and will finally force them to build safer trailers,” CVN noted, quoting plaintiff co-counsel Brian Winebright https://www.freightwaves.com/news/wabash-national-hit-with-462m-verdict-in-trailer-equipment-case

 We also encouraged trucking companies to take steps to protect road users and their bottom line by making sure that their fleets are equipped with Rear Impact Guards (RIGs) which qualify for the IIHS TOUGHGUARD Award and side impact guards that prevent side underride fatalities.

The mailing list for the 200 companies can be found here.

The Carrier Letter Template can be found here

A similar Certified Mail Letter went out to carriers in 2020. Relevant information is posted here.

Further details and copies of delivery receipts can be obtained by contacting marianne@annaleahmary.com.

Underride Crash Test Videos

If a picture is worth a thousand words, an underride crash test video is worth at least a million. Nothing is more convincing of the fact that underride protection can mean the difference between life and death. Well, nothing except viewing a crash test in person.

To that end, here is a sample of crash test videos which serve to document the technical effectiveness of underride protective devices — more startling when juxtaposed against crash tests with no underride protection or too-weak designs.

The difference a well-designed rear underride guard can make
Benefits of side underride guards for semitrailers
Underride Crash Tests – Unguarded Trailer vs Guarded Trailer
D.C. Underride Crash Test: Left Side Overall Vertical
Crash Test of Rear Reinforcement Attachment

In case you need a reminder, these crash tests are not conducted merely to satisfy curiosity, but in an effort to bring an end to ongoing preventable, unimaginable underride tragedies.

Fleet Managers, Please take note:

Trailer Safety: How to prevent underride crashes and save lives

Advisory Committee on Underride Protection, February 8, 2024 Meeting Record

The NHTSA Advisory Committee on Underride Protection held its third meeting on February 8, 2024, via Zoom. The main agenda item was rear underride. Presentations and discussions from the meeting can be viewed by using the YouTube video links below.

Meeting Segment
ACUP Welcome & Call to Order
Rulemaking Process – Lina Vallivullah (NHTSA)
A History of Trailer Rear Impact Guards from Utility’s Perspective; Jeff Bennett (Utility Trailers)
Truck Rear Underride; Matt Brumbelow (IIHS) 
Hydro Concept Rear Impact Guard (RIG); Malcolm Deighton (Hydro Aluminum Extrusions) 
Crash Avoidance Technology; Wolfgang Hahn (ZF CV Systems North America) 
Rear Underride Guard Report Recommendations & References; Lee Jackson & Jennifer Tierney (Truck Safety Coalition) 
A Historical Overview of Rear Underride Research, Recommendations, & Rulemaking; Marianne Karth (AnnaLeah & Mary for Truck Safety)
Rear Underride Prevention – Creating Crash Compatibility: Rear Guard Standards; Rear Guard Weight; Rear Guard Retrofit; Aaron Kiefer (Collision Safety Consulting) 
ACUP Member Discussion of Past & Present Motions – NHTSA Response to Information Requests, Assessment, & Recommendations, as well as ACUP communications

Truck Impact Guards = Underride Protection

So, you ask, what are Truck Impact Guards? To borrow from NHTSA terminology, Rear Impact Guards are devices attached to Commercial Motor Vehicles in order to GUARD against deadly underride and intrusion into the occupant survival space of a passenger vehicle when there is a collision or IMPACT [an impinging or striking especially of one body against another, Merriam Webster] at the REAR of a large truck.

The difference a well-designed rear impact guard can make

Although NHTSA does not yet require them, a Side Impact Guard is, likewise, a device attached to a large truck to GUARD against deadly underride and intrusion into the occupant survival space of a passenger vehicle when there is a collision or IMPACT at the SIDE of a large truck.

Underride Crash Tests – Without & With Side Impact Guards

Thus, it stands to reason, even though NHTSA apparently has no plans at present to require this life-saving device, a Front Impact Guard is a device attached to a large truck to GUARD against deadly underride and intrusion into the occupant survival space of a passenger vehicle when there is a collision or IMPACT at the FRONT of a large truck.

Volvo Trucks Safety – Front Impact Guard crash test

Truck Impact Guards do not prevent crashes. But, they do compensate for the lack of crash compatibility, which exists due to the geometric mismatch between the “bumpers” of two colliding vehicles that allows one to slide UNDER the other. Effective impact guards ensure that the passenger vehicle’s crashworthiness features — air bags, crumple zones, bumpers, seat belt tensioners — operate as intended to preserve the occupant survival space. This improved crash compatibility can, therefore, serve to make truck crashes more survivable.

These engineer-designed devices can also GUARD Vulnerable Road Users (VRUs) — pedestrians, bicyclists, and motorcyclists — reducing the likelihood of catastrophic injuries during collisions with large trucks.

What is Front Underride Protection? (Find out on April 17)

Upcoming Underride Advisory Committee Meeting Schedule

The National Highway Traffic Safety Administration (NHTSA) has announced the next four meetings of the Advisory Committee on Underride Protection (ACUP):

  • February 8, 12:30 – 4:30 p.m. ET; Topic: Rear Underride
  • March 13, 12:30 – 4:30 p.m. ET; Topic: Side Underride
  • April 24, 12:30 – 4:30 p.m. ET; Topic: Front Override
  • May 22, 12:30 – 4:30 p.m. ET; Topic: Underride Data

Register here to observe via Zoom.

February 8 will be the third public meeting of the committee, which was established to provide advice and recommendations to the Secretary of Transportation on safety regulations to reduce underride crashes and fatalities relating to underride crashes.

May 4, 2013 seems like just yesterday; has anything changed?

There’s no easy way to get through that time of year when we remember how AnnaLeah & Mary were suddenly snatched from this earthly life. How can it have been ten years ago? May 4, 2013 seems like just yesterday.

Read this post all the way through to find out what advances have come about, or skip to the end to find out how you can help. Despite our loud voices continuously raising awareness and pushing for change, progress has been painfully slow. But these are some actions which the USDOT has taken:

  • Rear underride guards are now on the annual commercial motor vehicle inspection checklist (rule issued by FMCSA in December 2021). This is important because poorly-maintained rear guards increase the chance of crash severity.
  • After beginning work on an improved rear guard rule in December 2015, in response to our 2013/2014 petitions, the National Highway Traffic Safety Administration (NHTSA) finally issued an improved rule in July 2022. Incredibly, it fell short of requiring that the guards had the full strength already proven possible by the IIHS testing of nine major trailer manufacturers! We have petitioned NHTSA to reconsider this ill-advised decision.
  • NHTSA began taking applications for membership on an Advisory Committee on Underride Protection (ACUP) in July 2022. They finally announced the selected committee members in April 2023. The first ACUP meeting will take place virtually on May 25. I’m thankful that I will, at last, be able to sit “around the table” with a diverse group of stakeholders to hammer out reasonable solutions to this century-old problem.
  • Simultaneously with the ACUP announcement, and in advance of receiving any recommendations from the Advisory Committee, NHTSA published an Advanced Notice of Proposed Rulemaking (ANPRM) for a potential side guard regulation. Their cost benefit analysis is based on questionable data and concludes that a side guard regulation would not be cost effective. We are working hard to provide more accurate information in order to correct the CBA in favor of saving lives.

“How can I help?” I thought you’d never ask!

  • Pray for the ACUP members and for this process to produce meaningful outcomes.
  • Only 17 states have an UNDERRIDE FIELD on their state crash report form. This contributes to underreporting of these deaths. By 5:00 p.m. EST on MAY 3, submit a simple, brief Public Comment here. Tell NHTSA you want them to require (not merely suggest) that states have an Underride Field (and which indicates whether it was front, side, or rear) on their crash report form.
  • By June 20, submit a Public Comment on the side guard ANPRM here. Tell them why you think that there should be a side guard regulation (simple reason: To Save Lives).
  • Tens of thousands of underride victims have been a nameless group whose senseless deaths have been swept under the rug for decades despite the ingenuity of engineers to prevent horrific underride. No more. We would like to remember these Precious Ones Gone Too Soon in a special way. We hope to receive permission from the USDOT to install a Commemorative Bell of Hope at their office building in Washington, D.C. We will be organizing a day In Memory of Underride Victims — to ring the bell and call out the names of individuals who lost their lives to underride. We do not know every name, but we will include as many as possible. If you would like to contribute to the purchase of this bell or participate in this event, please let me know by writing to me at marianne@annaleahmary.com.
Side Guard Crash Test in Raleigh, September 2022
To remember how AnnaLeah & Mary lived — full of love & laughter — not merely how they died.

Update on Underride Protection Progress

In July 2022, eight years after our original petition was delivered to the Department of Transportation, the National Highway Traffic Safety Administration (NHTSA), whose mission it is to save lives, prevent injuries, and reduce economic costs due to road traffic crashes, through education, research, safety standards, and enforcement, took the following actions related to underride protection:

In this crash test video, the top test shows what IIHS has proven possible, the bottom test shows what the 2022 rule will require:

By refusing to revise the December 2015 NPRM to the TOUGHGuard proven level of strength, NHTSA has demonstrated an unwillingness to require that all manufacturers install these stronger guards as Standard on new trailers. To state the obvious, the result is that manufacturers may continue to offer these guards as an Option, thereby allowing the ongoing production of trailers — into the future — with guards having a known unreasonable risk of Death By Underride. How do they sleep at night knowing that their meaningless rhetoric and regulatory malpractice means many more innocent people will needlessly die?

This is nothing less than a reckless disregard for human life.

Why are we working so hard to get weak rear underride guards replaced?

Why are we working so hard to get weak rear underride guards replaced?

Not only have we lost two daughters due to a weak rear underride guard, but we continue to see countless loved ones lost to other families in a similar way. Senseless deaths. Solutions are available — developed by innovative engineers but too often left on the shelf while people continue to die.

I get Google Alert notifications of truck crashes every day. Here are the rear underride fatalities which I have found in the last few months:

This memorial remembers a few of the countless underride victims from past years.

This video shows the difference between too weak & stronger guards:

Convinced?

FMCSA Issues Final Rule: Rear Underride Guards To Be Part Of Annual Inspections

FMCSA has issued a Final Rule, effective December 9, 2021, requiring Rear Impact Guards to be inspected as part of commercial motor vehicle inspections on those trucks which must have them installed. This is good because a guard weakened by cuts, tears, rust, bends, or loose connections is going to be less likely to prevent a car from going under a truck.

If a truck fails the inspection, the violation could cost a motor carrier a maximum of $15,876 and a truck driver $3,969. This could lead to the replacement of many rear underride guards — hopefully, with guards that meet the TOUGHGuard level of strength proven possible by the Insurance Institute for Highway Safety and now on many new trailers.

This is what I know about the availability of replacement equipment:

Retrofit Solutions for Rear Impact Guards to Prevent Deadly Underride

Examples of poorly-maintained guards:

Proper Maintenance of Underride Guards Can Spell the Difference Between L-i-f-e & D-e-a-t-h