Thursday, October 22, 2026
NewsSemi-trailer under-ride guards could kill you

Semi-trailer under-ride guards could kill you

Of the countless advancements and improvements made to cars over the last decades, the one that has the greatest impact on your life, that is until you need it, is your car’s crash-worthiness.

There’s an old, yet still good, video on the web that demonstrates what happens when a 2009 Chevy Malibu comes into contact with a pristine 1959 Chevy Bel Air. The result ain’t pretty.

But despite the incredible evolution in safety, there remains an important issue when it comes to semi-trailers. Distracted driving could be one reason why someone would accidentally rear-end a trailer but one thing is certain, at any speed above 30 mph (45 km/h), you may not live long enough to be less distracted next time you hit the road.

The under-ride guards, or trailer bumpers if you prefer, fail to provide adequate protection and prevent cars from submarining under the trailer. Because the under-ride guards are too weak, they do not allow the car’s safety structure to deform and absorb the crash energy.

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Matt St-Pierre
Matt St-Pierre
Trained as an Automotive Technician, Matt has two decades of automotive journalism under his belt. He’s done TV, radio, print and this thing called the internet. He’s an avid collector of many 4-wheeled things, all of them under 1,500 kg, holds a recently expired racing license and is a father of two. Life is beautiful. Send Matt an emai

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