Gosh, If I had a dollar for every time some knucklehead said "what if you hit a semi in that little thing?!?" I tell them if you tangle with a semi it really doesn't matter what you are in, you are going to get the short end of the stick... but I can tell that comment usually goes in one ear and right out the other.
I don't know the exact number, but I think that something like 90% of the safety of a car lies in the driver's hands. So it's mostly up to you.
There was an SUV vs SUV head-on at the same location as the picture above, a Suburbam and an Explorer. I can't find the pictures anymore, needless to say the Suburban lost a passenger. Further proof of "an impact is an impact". Plus most of the SUV's out there where never designed for impact/roll protection, that was designed and/or legislated only in the latest generation. Safe?...."you bet - just look how big it is.....you will drive right over those little cars.....and it holds 15 people too....." Joe Isuzu