The primary cause of an accident is human error ... where people are not paying enough attention to what is happening all about them, or chatting on the phone, texting, radio volume too loud, etc. Driving a vehicle is a serious matter ... driving is a privilege not a right ... if it were a right you would not need to apply for a license.
Turn that mobile phone OFF ... concentrate fully on driving as it deserves 100% of your attention and senses in order to navigate our roadways. The life you save might be your own.
I would have to say talking or texting on your mobile phone
Studies show cell phones are NOT the number one cause of collisions.
One study showed looking at the scene of another collision was a major cause of collisions. The #1 aggressive driving behavior in collisions is speeding.
Depending on your definition of "unsafe", there are many possibilities. Some are: alcohol abuse, drug abuse, and reckless driving.
unprotected sexual activity can result in pregnancy and STD's, this is very unsafe behaviour.
While drinking and driving is very high on the list using a cell phone is also very bad- ESPECIALLY TEXTING WHILE DRIVING. Put the phone away, and keep your thumbs on the wheel.
speeding
Turning improperly
Improper speed.
Drinking
Too much or unsafe speed
Too much or unsafe speed.
Too much or unsafe speed
Too much or unsafe speed
Too much or unsafe speed
Drunk in driving
Anxiety
Too much or unsafe speed.
too much of unsafe speed