Do you change all four of your tires?

junkyardhero said
yes.... but... data shows the total number of registered vehicles on the road has nearly doubled since 1979.

so by statistics there should be more cars in the ditches...

Also, there is a false sense of security now days. We used to drive like we had a brain. Many now days don't. Front wheel drive, anti lock brakes, traction control. all wheel drive, lane alert, and self driving features and all to blame.