This horrific CCTV footage shows a lorry driver ploughing into a line of traffic which is queuing to leave the M25 motorway (London's ring road).

The truck driver, Anton Maizen, didn't slow down despite seeing the stationary traffic in front of him. One of the car drivers was killed. Maizen was sentenced to four and a half years in jail last Friday.

This is exactly the kind of accident I fear when sitting in a line of traffic on the motorway whilst other lanes are flowing. My senses go to red-alert and my eyes are constantly on my mirrors. I leave room to move to either the left or right and leave plenty of space in front of me to do so at a moment's notice.

I'm not saying the accident in this video could have been avoidable by anyone but please take a read of my tips on how to avoid crashing and analyse your own driving. Don't let yourself be a victim of someone else's stupidity.