carnuted wrote:Seatbelts save some lives, but they definitely take others. I was in an accident where getting thrown from the car saved my life. If I had been strapped in my seat, I would certainly be dead. If you ask an honest cop who has been on the job long enough to work traffic fatalities, most will tell you that it is a 50/50 thing. Half the time they weren't wearing them and should've been, and half the time they were wearing them and might still be here if they weren't. Our government needs to stop treating us like babies and let us make our own decisions. Over regulating everything has pretty much, and soon will, regulate our country and freedoms out of existence.
Its not 50/50. Certainly there are times when being ejected from the vehicle might have saved a life, but most people who are ejected die or end up with serious injuries. And certainly, there are probably times when a seat belt might have contributed to someone's death. But statistically speaking, you are much better off with seatbelts than without. Consider yourself lucky to be alive. 73% of people who are ejected from a vehicle die regardless of if they are wearing a seatbelt or not. Something you should think about when you consider how it compares to what might have occured had you been wearing a seatbelt; along with how often an accident is not going to fall within typical accident scenarios (very few accidents are fatal and very few accidents involve passenger ejections). The statistical odds of you being in another accident in which being thrown from a vehicle will save your life are much slimmer now. That is, the chances of surviving one accident in which you are ejected is 27%. A single person surviving 2 such accidents drops to 13.7%. This factors in nothing about accidents in which you physically hit the steering wheel, dash, or windshield.
Consider what happens in a frontal collision. The accident investiation business tends to regard all car accidents as having three impacts. That is one between a car and another object, the impact between the passenger and car, and the impact between the internal organs of a passenger and the parts of the body that hold these organs in. For the purposes of what I will discuss, we'll focus on the first two.
When you wear a seatbelt, typically, what happens is there is the collision between the vehicle and another object. This collision begins slowing down the vehicle. Crumple zones in vehicles tend to slow down the portions of the vehicle behind it at a slower rate (consider a rigid body that doesn't deform; the passenger compartment would stop immediately). The seatbelt catches the passenger and essentially slows the driver down at the same rate as the passenger compartment.
By contrast, with no seatbelt, the passenger compartment begins to slow down. But the passenger doesn't. The passenger continues at the speed the vehicle was travelling prior to the impact until they hit some part of the car. Since it takes time to travel the distance from the seat to the steering wheel, dash or windshield, the car will have slowed down much more than the passenger. As such, the passenger will hit the inside of the car with a almost all the energy he carries as a result of the speed he is traveling in relation to the car itself. As such an impact disperses this energy nearly instantaneously, the amount of force exerted on the passenger will be much greater, which increases the chances of injury and death.
Going back to the article, the regulations discussed would further reduce the chances of injury. The items discussed in it are:
-side airbags-active head restraints-electronic stability control-anti-lock brakes-rearview cameras
Side airbags have been a huge help in protecting drivers in side impacts. If you've ever watched video of a side impact on a high speed camera, you'll see how if a lower profile vehicle is hit by a truck, the crash test dummy head can hit the front of the truck through the window. While they do add some weight and hardware, they do provide much more safety than passive systems for side impacts.
Active head restraints on the other hand, have little effect on the overall weight. They are designed so that the headrest pushes forward in a rear collision and reduces whiplash. Contrary to popular belief, whiplash does not occur at the back of the neck. It actually occurs at the front when the front of the neck becomes stretched as the head is whipped rearward. By actively pushing the head forward, it reduces such stressing and the resulting injury. The system works mechanically and is actually a pretty simple device as the force of your body's mass on the seat pushes on arms that attach to the headrest. As these arms are pushed rearward by your body, it uses a lever type of action which pushes the top of the headrest forward. As such, it involves a nominal increase in mass. The other option would be to have the headrest in a forward static position, but that tends to be uncomfrotable for drivers.
The electronic stability controls, anti-lock brakes and rear view camera/sonar try to reduce injury/death by reducing the chances of an accident occuring in the first place. There is a little bit of additional mass, but its unlikely that it will be significant. But all are effective. The rear sonar or camera likely wouldn't have any effect on reducing injuries to passengers, but would likely reduce potential injuries to pedestrians and damage to bumpers. A lot of accidents occur in parking lots which involve someone backing into someone else. Both the camera an sonar are also a huge convenience. I have both on my Titan and its made backing a lot easier. I can easily get to within a foot of anything behind me pretty precisely. Hell, I can more confidently and precisely place my truck close to an object behind it than I can in front of it.