•  Drive too fast or too slow.

•  Make jerky starts or stop abruptly.

•  Overshoot stop signs.

•  Ignore traffic signals.

•  Follow cars too closely.

•  Pass other cars too quickly or too slowly.

•  Change lanes frequently.

•  Drive without their lights on after sundown.

•  Drive with their windows rolled down in cold or wet weather.

•  Are obviously partying and having a good time with their passengers when they should be paying attention to the road.