Quote:
Originally Posted by ppgroup
Sorry but the link is not bringing up the HUMMER safety rating page - you can navigate to it through the this link if you want.
http://www.safercar.gov/
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It says you can only compare cars within 250 pounds of each other.
I think this is because of physics.
Yes the Honda Civic is safe, but it is light.
Even though the Hummer and Civic both got 5 stars for driver frontal crash test if the crash is head on Hummer against Civic the Civic will lose.
The Hummer is much heavier so it will be slowed down by the crash but the Civic will probably stop and recoil back very fast - resulting to greater impact to the Civic occupants than to the Hummer occupants.
Example (numbers are made up but the concept is sound.)
Let's say they crash head on both going 30 miles per hour.
An instant after the impact the Hummer will have slowed down to maybe 15 miles per hour whereas the Civic will have stopped and recoiled back and move backwards at perhaps 10 MPH.
Change in speed for the Hummer is 30-15 =15MPH
Change in speed for the Civic is 30 to zero then back 10 = 40MPH
A greater sudden change in velocity means more impact on the Civic occupants..
All the safety features in the world can't undo physics.
Granted head-on is only one of many types of possible crashes.
The Civic is more nimble and manuverable and better able manuver away from a crash and is less likely to roll over.