Abstract
A total of 143,695 errors were checked - an average of 13 errors per driver. This is equivalent to an error for each 0.4 mile of travel. If this is typical of all drivers, it means that a driver who drives 10,000 miles per year would make about 25,000 errors annually. No wonder so many drivers get into trouble. In the following charts, each bar indicates the number of driving errors made for each one hundred drivers.