When there is no strong physical barrier under a truck bed, Death By Underride becomes a known unreasonable risk. Fortunately, engineers have developed effective physical barriers or underride protection – although it is not required by law. With that in mind, a group of engineers carried out R&D crash testing on August 3 at the Raleigh Underride Crash Test Event.
Four side crash tests were conducted into semitrailers:
Ford Fiesta into an AngelWing side guard from a 45 degree angle (39 mph)
Chevy Malibu into an unguarded trailer from a 45 degree angle (38 mph)
Chevy Impala into a SafetySkirt side guard in the rear area behind forward positioned trailer axles from a 90 degree angle (36 mph)
Chevy Malibu into a SafetySkirt side guard from a 90 degree angle (43 mph)
Crashed trailers were each ballasted with approximately 28,000 pounds in water tanks. Video footage in this LinkedIn post by Forensic Rock, highlights two of the crash tests:
We love working with passionate people in the AR field. And Aaron Kiefer is one of those super-passionate people we absolutely love working with.
We were lucky enough to help him and his great #StopUnderrides group collect data for an awesome test series they were running in North Carolina. His goal was to demonstrate the collision mitigation of different trailer guards on side underride collisions with lower-profile sedans.
This compilation video compares an unguarded 53′ van trailer to Aaron’s SafetySkirt design. Two Chevrolet Malibu’s were used in this test series.
The speed at impact in the unguarded test was 37.5 mph; the speed at impact for Aaron’s SafetySkirt test was 43.4 mph.
We won’t spoil it for you, but Aaron certainly knows what he is doing.
It is not often that you get the opportunity to work with a great crew of people (Aaron Kiefer, Marcus Gainer, Quentin Beverly, Robert and James Gilmore, and Hyle Herwick) to accomplish something that is so meaningful, and life-saving. But I was truly blessed today to have that happen.
The Carolina Trucking Academy, owned by Charlie and Donna Gray, has been one of the biggest supporters of our efforts on this journey we have been on for years in helping prevent death by underride. Today we were able to place an AngelWing side guard on one of the Academy’s trailers.
It was, once again, an engineering challenge as the trailer was shorter than the normal 53-foot trailers we normally work with. But Aaron Kiefer — as always — came up with the modifications which were required.
Marcus went to work on the Academy trailer — cutting the holes required in the cross members for fitting the support beams in place. Meanwhile, the rest of us started the process of removing the AngelWing from the underride research/storage trailer and preparing it for its new home on the Academy trailer. Each section of the guard was carefully removed, with every bolt, nut, and washer lined up in readiness for the installation.
With dedicated teamwork, we were able to complete the installation of the AngelWing side guard on the Academy’s trailer. So now this life-saving device will be on the highways and byways in and around North Carolina –demonstrating not only great driver training but also the commitment of Charlie and Donna to have the safest equipment on the road.
The Insurance Institute for Highway Safety (IIHS) conducted an important crash test on March 30, 2017. They crashed a car at 35 mph into the side of a trailer equipped with AngelWing side guards. This crash test was later repeated successfully at 40 mph at the Second Underride Roundtable on August 29, 2017. It was official. Deadly side underride tragedies could be prevented.
What seemed perhaps even more significant was the fact that the following day, March 31, 2017, the IIHS conducted a second crash test into the side of a trailer — only this time, there was no side guard. The stark contrast of the two crashes was captured on film for all to see. Who could argue the benefit of this feasible feat of engineering technology?
Apparently it has not been enough to convince everyone, as we are still struggling to bring this uphill battle to an end five years later. Pray that Pete Buttigieg, the Secretary of Transportation, who is tasked by Congress with making a determination this year, will conclude that saving lives is worth the cost to require trailer manufacturers to equip new trailers with side guards. Otherwise, the inaction of industry and government will allow the senseless, violent slaughter of unprotected road users to continue day after day, year after year — while engineering solutions sit on the shelf gathering dust.
Will Congress finally, after 52 years, take bold, decisive legislative action to mandate strong comprehensive underride protection? Or will they leave it to DOT to determine if side underride protection is “warranted” before issuing a mandate?
How many more people — like a woman in a Greenwich crash on July 3, 2021 — will needlessly die due to a dangerous truck design for which engineers have developed solutions?
Fatal truck crash in Greenwich on July 3, 2021 (photo provided by passerby)
Will trucks on our roads continue to be Unguarded: Death by Underride? Or will Congress boldly send the message through inclusion of strong underride provisions in the Infrastructure Bill to Fix the Problem NOW!?
Engineering ingenuity and a lot of hard work went into the research, development, and installation of this fully-guarded trailer system. This week, a small carrier in North Carolina became part of our pilot program. We are thankful that they have agreed to provide us feedback on this #SaferTruck as they drive it on the road to carry out their transport business.
What does fully-guarded mean? It means that every part of the trailer — at the rear and both sides — is covered by equipment which has been installed to prevent a car (or pedestrian, biker, or motorcyclist) from going under the trailer in the event of a collision.
A recent article from Transport Topics caught my eye. It’s all about this & that concerning side skirts on trailers (for fuel savings). Lots for a trailer buyer to consider when making a decision.
Installing the complete system takes 2.5 man-hours, he said.
Wikipedia has to say this about cost: As of 2009, a set of trailer skirts cost between C$1500 and C$3000 (US$1300 to $2700). Standard trailer skirts have an estimated payback period of ten to eighteen months, while “advanced” skirts (those that improve fuel efficiency by over 7%) are estimated to pay for themselves in seven to fourteen months.
Seriously?! An AngelWing side guard can be installed in close to that amount of time. And if side guards were socially acceptable and widely embraced so that they readily available to purchase (you know how supply and demand works, right?), the price could quite likely be comparable. Plus side guards may enhance fuel savings when used with side skirts.
So why the fuss from the industry about the cost of LIFE-SAVING side guards!?
Read the whole article for yourself and tell me why there is such resistance to installing comprehensive and effective underride protection and outright opposition toward a mandate which would require it.
Members of the trucking industry have expressed concern about potential operational issues which might occur with long-term use of the AngelWing side guards. Last week, we received an email with feedback from Glen Berry, COO of Thomas Transport Delivery, Inc., a transport company which installed the AngelWing side guards, in August 2017, on one of their trailers which goes back and forth between Ohio and Texas every week.
Marianne/Andy,
As requested…We now have 305,000 miles of Angel Wing use. There has not been a single issue with the structural integrity of the trailer since its installation. My initial concerns, of the Angel Wing System making the trailer frame rails excessively rigid, have dissipated. Because of the bracing structures design characteristics being very stout, to serve their purpose of course, I was worried they may cause frame rail stress, resulting in cracks or other compromises. This has not been the case. Again, I have had zero issues. I am very happy to inform everyone involved…The Angel Wing Test has been an outstanding safety project to be a part of.
Thank you.
Glen Berry
Update on January 28, 2021: Here is an August 12, 2020 Public Comment to NHTSA related to operational & cost issues of underride protection.
Here’s another happy owner of an AngelWing side guard system:
Here’s a crash test of a car into the side of a flatbed trailer at 47.2 mph:
Regarding cost of production of AngelWing: Not all 11 million trailers would require side or rear guards based on their height relative to the ground, and many trailers are wheels-back trailers (see page below). And using a $2,900 price for a single aftermarket guard is clearly not where the price would end up. If a 13,000 lb trailer sells for no more than $30k or $2.3/lb then a side guard is gonna end up an absolute max of $1,300, but likely way less due to its simplicity relative the rest of the trailer. I have designs and costs estimates from trailer makers showing it would be far less. (Perry Ponder, email, 9/18/2019)
AngelWing installed on a flatbed trailer:
Strick Trailers was motivated briefly to design side guards for their trailers after the Maravilla verdict back in ’00. Anyway this 700ish pound side guard was estimated to cost them $328 materials and labor to make at that time. A straight inflation conversion takes that to $450 in 2019 dollars… (Perry Ponder, email, 9/18/2019)
Remember the UVW study about length of trailer, wheelbase length and the height of trailer’s lower edge. It showed that a trailer would have to be much lower than the AW makes it to hang up on in-spec RR crossings and driveway transitions (see diagram below from that study). But the RR crossing argument is another red herring. Google “semi trailer hits overpass” and you’ll see more instances of the height of a trailer causing problems than low trailers at RR crossings…is anyone in the industry arguing for lowered trailer roofs? (Perry Ponder, email, 10/16/18)
Backing a trailer with the SafetySkirt side guard across a raised median:
Update on January 28, 2021: August 12, 2020 Public Comment to NHTSA related to operational & cost issues of underride protection.
Are you aware that AngelWing was successfully tested when a mid-size car was crashed into the side of a tractor trailer at both 35 and 40 MPH at the Insurance Institute for Highway Safety with no Passenger Compartment Intrusion?
Are you aware that DOT administrators were invited to view crash testing of side guards less than a mile from the D.C. DOT Offices on March 26, 2019? (at least one FMCSA official attended)
Are you aware that AngelWing has been in commercial use for over 8 years?
Are you aware that AngelWing has over 800,000 miles in commercial use on the U.S. highways?
Are you aware that AngelWing has been durability tested?
Are you aware that AngelWing has shown no operational issues (such as loading docks and railroad crossings)?
Are you aware that AngelWing has shown no stress or damage on the trailer frame?
Are you aware that AngelWing is being commercially used and one route is from Cleveland, Ohio to San Antonio, Texas round trip every week over 3,000 miles per week without any issues — since August 2017?
Are you aware that AngelWing and a side skirt increase MPG for a tractor trailer?
Eight major trailer manufacturers have designed stronger rear underride guards to withstand a crash test at 35 mph all the way across the back of the trailer — earning them the TOUGHGuard Award from the Insurance Institute for Highway Safety (IIHS). This is significant because their previous designs — though meeting the current federal standard for rear guards — have been proven too weak and ineffective by IIHS.
There are about 300,000 new trailers sold every year. Some manufacturers are selling the stronger guard as Standard on all new trailers. Others are selling it as an Option, meaning that trailers may still be sold with guards known to be too weak to stop cars and save lives.
In addition, if we don’t retrofit the existing 11 million+ trailers with stronger guards — which will meet the TOUGHGuard criteria (plus side and rear underride protection) — it will be years before the entire fleet will be safer to drive around.
Fortunately, some of the trailer manufacturers have a retrofit kit for the rear guards, so that a trucking company could theoretically purchase kits to make their trucks safer. However, without a mandate to do so, I don’t imagine that will happen too quickly.
But I am encouraged by the work of Aaron Kiefer, a North Carolina crash reconstructionist who has seen so many underride tragedies that he decided to design some solutions on his own — primarily out of his own pocket and on his own time, with the support of his family who share their husband and dad with his life-saving project.
Just this weekend, Aaron installed the latest version of his Rear Reinforcement Attachment to a 53 foot trailer. Over the last five years, Aaron has been developing a design for two aluminum triangles, which are fastened to both sides of the trailer and then attached to both ends of the existing rear underride guard.
The latest version installed on September 15, 2019.
This reinforces the strength of the rear guard — improving its capability to stop a car and prevent underride. But it, also, serves as the point of attachment for Aaron’s side guard invention, the SafetySkirt — polyester webbing which can be combined with a side skirt to both save fuel and save lives.
A previous version of the Rear Reinforcement Attachment and SafetySkirt system.
You can see the SafetySkirt being tested at the D.C. Underride Crash Test Event on March 26, 2019:
We are looking forward to the day when Aaron’s SafetySkirt System can be tested at IIHS to prove its usefulness as an affordable, lightweight solution, which could theoretically be available as an option to retrofit any truck on the road with effective side and rear underride protection.
Aaron, like Perry Ponder who invented the AngelWing side guard, and countless other engineers, who should be given a green light to solve the underride problem, are amazing members of my Underride Hero Hall of Fame — along with my husband Jerry who has contributed a wealth of ideas in this underride advocacy journey.
Safety engineers and professionals share their knowledge and thoughts in a Panel Discussion on the underride issue at the D.C. Underride Crash Test Event on March 26, 2019:
David Friedman, Consumer Reports, VP, Advocacy, formerly the CR Director of Cars and Product Policy and Analysis, former NHTSA Acting Administrator
Malcolm Deighton, engineer with Hydro, which supplies aluminum for manufacturing underride protective devices and trailer parts and which produces comprehensive underride protection technology in Europe
Perry Ponder, inventor of AngelWing, engineer with an accident reconstruction engineering company
David Dorrity, worked for Stevens Transport for years and testifies all over the country on safe trucking practices.
Aaron Kiefer, forensic engineer & crash reconstructionist, inventor of SafetySkirt
Moderated by Andy Young, truck litigation attorney and CDL holder.
The discussion can be viewed in four consecutive videos below.
Part 1:
Part 2:
Part 3:
Part 4:
Thank you, Perry, David, Malcolm, Aaron, Glen, David, and Andy, for taking the time to share your knowledge and thoughts on the underride problem and solutions to this deadly but preventable traffic tragedy.
Note: Video of the crash tests are available here.
If you were not able to witness the Underride Crash Tests in D.C. in person on March 26, then the next best thing is to see the media coverage of this important event and to view the video footage of all three tests of a car colliding at approximately 30 mph with the side of a tractor-trailer:
The first crash test was into a trailer with an AngelWing side guard — SUCCESSFUL because it prevented underride and Passenger Compartment Intrusion (PCI).
The second crash test was into a trailer with a SafetySkirt side guard — SUCCESSFUL because it prevented underride and Passenger Compartment Intrusion (PCI).
The third crash test was into a trailer with NO side guard (as is the situation with 99.9% of the trucks on the road today) — SUCCESSFUL in that the devastating underride which occurred clearly showed what it is that the other two tests so importantly prevented.
VIDEO FOOTAGE from MGA Research of all three crash tests can be seen here:
MGA Research brought their high speed cameras to capture this video footage. Links to additional video will be shared when their creative team completes their work. WUSA9 had a GoPro camera inside the crash car.
Video of the Underride Panel discussion at the event can be viewed here.
David Friedman, Consumer Reports, VP, Advocacy, formerly the CRDirector of Cars and Product Policy and Analysis, former NHTSA Acting Administrator
Malcolm Deighton, engineer with Hydro, which supplies aluminum for manufacturing underride protective devices and trailer parts and which produces comprehensive underride protection technology in Europe
Perry Ponder, inventor of AngelWing, engineer with an accident reconstruction engineering company
David Dorrity, worked for Stevens Transport for years and testifies all over the country on safe trucking practices.
Aaron Kiefer, forensic engineer & crash reconstructionist, inventor of SafetySkirt
Unsung hero of the event: Last year, on May 15, 2018 (what would have been the day my daughter AnnaLeah turned 24), after a hard day of hitting our heads against the wall in trying to convince legislative staffers to move the STOP Underrides! Act forward, I texted my son and said, “How are we going to get them to move?!” He texted back, “Hold a crash test at a field hearing.” I said, “What?!” It was a brilliant idea to let the leaders of this country, who can take action to end these preventable tragedies, witness crash testing in person!
Well, we couldn’t bring about a Field Hearing, but we quickly began the overwhelming process of organizing an Underride Crash Test Event right there in D.C. — less than 2 miles from The Hill and 1 mile from the Department of Transportation.
Lois Durso and I, along with our families, friends and other underride victim families, want to thank the multitude of individuals, organizations, and companies (both named & unnamed) who have helped us as we work to pass the STOP Underrides! Act (S.665 & HR.1511) and bring about this amazing and totally volunteer-organized event:
And I want to especially thank the skilled and dedicated Team Underride Crash Test Crew:
We also want to thank Akridge and ImPark for allowing us to use their D.C. parking lot (not an easy thing to find!), Northern Neck Auto Parts for providing the crash cars, and Sunbelt Rentals for providing safety barriers and equipment helpful in moving around the many vehicles to make the three crash tests go smoothly in such a short space of time. MGA Research captured amazing video footage, Mister Video ran the sound system, Andy Young served seamlessly as MC, and Aaron Kiefer masterfully orchestrated the crash test crew in order to help us all see the clear-cut life & death difference which underride protection can make.
AngelWing crash car:
SafetySkirt crash car:
Unguarded crash car:
We hope that this event will continue to raise awareness and that our message to Congress will grow stronger as people sign & share this petition: Congress, Act Now To End Deadly Truck Underride!
This event was brought about in memory of countless underride victims and in hopes of helping countless others walk away from truck crashes and live to tell about it. . .
