If you follow us on the Phillips Webster Twitter feed, you know that we monitor car accidents in Washington State closely. It seems at least twice a week someone is either personally injured or killed in a rollover accident. Read the police report on many of these crashes and you will find that most rollovers occur when a driver loses control of a vehicle, and it begins to slide sideways. The tires are designed to hug the road and that’s exactly what they do.
Frequently, rollover accidents are caused by a curb or shoulder on the side of the road. These destructive accidents can also happen due to excessive speed or over reacting to hazardous road conditions. Regardless of the causes, rollover accidents are not the main type of accident. In fact, compared to other types of accidents, they are very uncommon. The reason that they are such a concern is that, though they have a low occurrence rate, they are ranked #3 for the type of accidents that cause injuries and death.
This has caused many vehicle safety advocates and insurers to put the spotlight on the issue of “roof crush” and “crashworthiness.”
- Crashworthiness is the ability of a vehicle’s structure withstand an impact in order to protect its occupants.
- Roof crush is the failure and displacement of an automobile roof into the passenger compartment during a rollover accident. Roof crush is caused by weak roof pillars and windshield header that are not strong enough to hold up the weight of the vehicle as it hits the ground, so it intrudes into the occupant space. In rollovers, roof crush causes side window failures creating ejection portals for occupants to be thrown from the vehicle. The largest number of casualties in rollovers is from ejection. Roof crush also causes a significant number of head and neck injuries: typically the most severe consequences of rollovers.
Roof Crush Controversy
A three decade fight has been raging in the courts and beyond between car manufacturers and victims regarding the association between roof crush in rollovers and serious head and neck injuries. One side states that there is not enough regulation, attention, or engineering thought put into the design process to adequately test and protect drivers. The other side says that the correlation doesn’t exist and it seems that the government has taken their own sweet time to addressing the issue.
Some studies have reported that roof strength and injury are not causally related but that occupants are injured as they “dive” into the roof before it crushes. Conversely, other researchers maintain that injuries occur when the roof buckles into the occupant compartment and contacts the people inside.
The Insurance Institute of Highway Safety (IIHS) has taken both of these notions to task. Their tests of front and side impact collisions shows that limiting intrusion in the occupant compartment is necessary to provide space for the seatbelts to work. The same principle applies to rollovers.
An IIHS study in 2008 discovered that strong roofs reduce the risk of fatal or incapacitating injury in rollover crashes and was confirmed by a second IIHS study using a different set of vehicles. These were the first studies to demonstrate the link between roof strength and injury risk.
The studies also showed that a reinforced or better constructed roof reduces the risk of ejection from the vehicle. These findings have since been confirmed by two studies by the National Highway Transportation and Safety Administration (NHTSA). The first found that reduced roof intrusion is associated with lower injury risk and the second showed a relationship between higher roof strength and lower roof intrusion.
However, the issue of testing (or lack there of) still remains, keeping drivers at risk regardless of the research.
Roof Crush and Crashworthiness Testing
Federal Motor Vehicle Safety Standard (FMVSS) No. 216, Roof Crush Resistance, was released in 2005 as part of an evaluation of this serious issue. It is intended to establish a minimum requirement for roof strength in order to “reduce deaths and injuries due to the crushing of the roof into the occupant compartment in rollover crashes.”
The original roof test that was established in 1973 and stayed in place until 2009 required by the NHTSA made those testing the vehicle to have a rigid plate pushed into one side of the roof at a constant speed. The rule dictated that the roof must be strong enough to prevent the plate from moving 5 inches when pushed at a force equal to 1½ times the weight of the vehicle. Many fest that this test was not adequate and was bad methodology in testing the problem.
The new rule requires that a roof withstand an applied force equal to 3x the vehicle’s weight at the same time maintaining sufficient headroom for an average size adult male. As you can see, this avoids serious neck and head injuries. The new standard will be phased in beginning with 2013 model vehicles, and by the 2017 model year, 100% of each manufacturer’s fleet must comply.
About Vehicle Head & Neck Injuries
All of these regulations and changes do not prevent rollover crashes, but they go a long way in attempting to avoid the rash of catastrophic neck injuries caused by roof crush. The crushing roof pushes the head of the occupant down causing the neck to bend or compress which results in tearing of ligaments and disruption of the vertebral bodies.
As you can see the spine is compressed and can cause:
- Broken vertebrae
- Spinal cord injury
- Disk injury
- Quadriplegia
- Head injury
- Traumatic brain injury
Washington Car Accident Attorneys
Rollover accidents can cause serious personal injury and or wrongful death and likely will require a lawyer who is experienced in accident and personal injury law. If you or someone you know have been injured in a rollover accident it is imperative that you find legal council that can walk you through the insurance and litigation process. Call the Washington Car Accident Lawyers at Phillips Webster for a consultation.
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