I felt safer driving for hours at 100 MPH + on the autobahn in Germany than I do on our interstates. The primary factor for this has to do with 2 things - driving to right unless you are passing and strict adherence to traffic laws which leads to predictable behavior and driving patterns. Rarely saw an accident.
What do the Germans do to drivers that don't have a license, insurance and brakes? We give them a check every month.