Here oare some of my personal observations from 20 years in fire/rescue:
(These concern single vehicle rollovers only with no outside influences)
Full-size vans are more prone to roll over than SUV's.
SUV's are more prone to roll than large cars (Chevy Caprices, Lincoln
Towncars and the like).
4wd SUV's are more prone to roll over than 2wd SUV's.
Smaller cars are more prone to roll over than larger cars.
Empty 2wd (not lifted or with larger tires) pick-ups have about the same
tendency to roll over that larger cars do.
It's not only the overall height, although that is one factor. I find the
largest factors in single-vehicle rollovers not having to do with operator
error or equipment malfunction involves the overall weight of the vehicle
versus the track width of the vehicle. The Toyota Echo and Matrix, and the
Ford Focus are all lightweight cars with narrow tracks and significant
height vs. width ratios. All of these are very prone to rollovers.
Speaking from personal experience, it's hard to get a Towncar or full size
2wd pickup truck to roll over even using a forklift!
Cheers - Jonathan
Jonathan A. Race
Lieutenant, EMS Supervisor
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