Tag Archives: safety recommendations

Overlooked Vulnerabilities in Truck Crashes: Damage to Steering Mechanism & Fuel Tank

Safety Advocacy, Truck Safety, , , , , , , , ,

Being a passionate advocate for making truck crashes more survivable, I signed up for Google Alerts on truck crashes. Every night I get an email notifying me of truck crashes across the country. Mostly I look for evidence of underride. But I have noticed the frequency of truck crashes that involve fire. Why is that?

Last fall, I looked further into the problem of front override/underride of trucks over passenger vehicles — either in head-on collisions or when trucks rear-end passenger vehicles. What I found was that many countries have front underride protection standards to improve the outcome in such crashes — including Europe, Australia, India, and Japan.

The front underride/override protection (FUP) protects the passenger vehicle occupants. However, it also protects the truck’s components from damage — including the steering mechanism, which means a truck driver will be more likely to maintain control in a collision. Additionally, underride protection can potentially prevent contact with a fuel tank and thus prevent a fire from starting.

NTSB Recommended FRONT OVERRIDE PROTECTION In 2010

after Truck OVERRODE 3 vehicles

Note the mention of fire and damage to the steering mechanism related to an underride crash in this research study, REVIEW OF TRUCK SAFETY: STAGE 1: FRONTAL, SIDE AND REAR UNDERRUN PROTECTION

Offset front underrun in head on crashes where the light vehicle is likely to collide with
the steer axle and compromise the heavy vehicles steering, and/or the underrun leads to
heavy intrusion of the cabin space by the heavy vehicle structure. Front underrun in truck into car crashes where the underrun can:
• rotate the light vehicle downwards and lead to the heavy vehicle running over the light
vehicle with catastrophic results;
• push the petrol tank down and lead to fire when the truck impacts the rear of the light

vehicle (p.4).

Where there was the ability for the truck to overrun the car bumper bar, the effect would be to compromise the cars energy absorption and increase the likelihood of intrusions into the cabin space. A further effect is that the rear of the car is pushed down and so there is an increased likelihood of fuel tank ruptures and of sparks being generated by steel contact with the road surface and hence significant increases in the risk of fire.  Hence overrun would be likely to increase the chance of fatalities in these crashes. (p.31)

Watch the rear of the car being pushed down in this side underride crash test:

The protection for the components of the truck are noted in this video of Volvo Front Underrun Protection System crash testing (starting at around 44 sec.):

So, tell me again why there is opposition and lack of action in the U.S. to mandate and install comprehensive underride protection — including Front Underride Protection (FUP). We are at a fork in the road: we can continue to let people die horrific underride deaths OR we can act decisively to mandate and move forward with comprehensive underride protection.

Congress, Act Now To End Deadly Truck Underride!

Front Underride Protection Brochure 6

Myth: Significant differences in vehicle mass responsible for truck crash severity. #STOPunderrides

Truck Safety, , , , , , , ,

Two days ago, I found an Insurance Institute for Highway Safety (IIHS) Status Report from August 26, 1989. It had two articles about front underride protection which clearly demonstrated the benefit of installing that kind of technology on large trucks to reduce the severity of collision injuries.

“Front End, Energy-Absorbing Truck Guards Reduce the Risks for Motorists”, 8/26/89, IIHS Status Report

Here’s another report which I found the next day. It is a NTSB Safety Recommendation from May 8, 2006, which clearly explains the benefits of front underride protection. Thirteen years ago. And I find myself to be the only one in the country talking about this at any level of insistence that we do something about this. Now.

https://www.ntsb.gov/…/safety-recs/recletters/H06_16.pdf

I found it interesting that NHTSA stated in June 2000 that, “the common belief is that not much can be done to diminish the consequences of crashes between smaller vehicles and large trucks because of the significant differences in vehicle mass.

[I know this to be a MYTH both because I know that underride protection can significantly change the outcome and because I am a truck crash survivor of a horrific crash due to the fact that the truck did not come into my part of the car.]

“However, research has shown that geometric height differences and a lack of forgiving front truck structures CAN be modified to help reduce heavy truck aggressivity and to mitigate the severity of these types of accidents. Examples of these modifications, often referred to as ‘front underride protection systems’–which can result in reduced intrusion or occupant injury–include energy-absorbing front structures to offset the weight differences between two impacting vehicles, as well as bumpers designed to deflect the impacted vehicle away from the front of the truck, thereby reducing the total change in velocity of the smaller vehicle.”

This added information stirs up anger in me at what could have been done well before our crash — in which a truck hit us (front underride protection) and in which we collided with the back of a second trailer (rear underride protection). Fortunately, it also stirs up in me renewed energy and zeal to bring down the walls of Jericho and an end to this senseless loss of lives.