Commonly known in North America as tail gating the most common dangerous driving behaviour is following to close.
Speeding.
Although it is more commonly referred to as "road rage" the applicable charge is Reckless driving!
Safe driving is not dangerous driving
Talking on your cell phone while driving is not dangerous.
alchohol can be very dangerous when driving
Yes it is. It is dangerous and incredibly stupid.
the first 5 minutes is the most dangerous time of a rainfall for driving.
Texting while driving is very dangerous and should be outlawed.
Yes
Primarily by observing driving behavior.
Defensive Driving
Driving erratically means not maintaining a steady speed , weaving in and out of traffic,or drifting from side to side in a lane. It is dangerous to other drivers because it is unpredictable behavior, and the police see it as a sign of a driver who may be drunk or under the influence of drugs.