Originally Posted by angie3096
Ah, okay thanks.
How do you find out what's been tested how?
If a CRS is labeled with the TSIP designation, it has been tested and passed side impact collision protocol. Keep in mind that all crash testing is done by the CRS manufacturer, in other words they self certify.
It is much more complex than this but generally speaking, the US-NCAP side impact test procedure is similar to the FMVSS 214 protocol. The main difference is that the impact speed is 5 mph higher in the NCAP test compared to FMVSS 214. This means an impact velocity of 62 km/h representing 55 km/h in car Y direction and 30 km/h in X direction.
The Insurance Institute for Highway Safety (IIHS) has instituted a more clearly defined, more severe side impact test, which would represent an "average" collision with an SUV. A trolley with a mass of 1500 kg hits the car in a purely lateral impact with a velocity of 50 km/h. Two SID-II dummies are used in the front and rear seats on the vehicle’s struck side. No child dummies are used in the IIHS side impact test. Measurements are taken such as HIC (head injury criteria) and chest injury criteria. Many experts believe that additional testing should account for some degree of vehicle intrusion into the occupant compartment, which overall the tests presently performed, do not.
There are still bugs to be worked out with respect to side impact CRS testing. Engineers cannot agree on the criteria. Many times the USA looks to European, Australian and Japanese testing standards as a basis or platform for determining our needs.
As for roll over testing.....NHTSA's 5 year plan (they are to complete the updates by 2009) is to address the rollover rate and subsequently test the rate and type of injury among other things, by updating federal motor vehicle standards first (so upgrading the safety in the vehicle your CRS's are in). Stabilitrac features/sensors, strengthened vehicle frames, rear side impact upper and lower thorax air bag protection, and a plethera of other changes have already been made or are currently in the works. The fact remains that roll over crashes only account for approx. 2 percent of all crashes, but they account for up to 1/3 of traffic fatalities
. Sad to say there is only so much money in the budget to go around. A 2% rate will not put this type of CRS testing on the fast track. And it should.