What are some types of behaviours motor vehicle drivers engage in that can cause serious injury to bicycle riders?

A motor vehicle operator who engages in the following types of behaviour can be held civilly liable in the event of an otherwise preventable bicycle collision:

• Changing lanes without activating a turn signal;
• Entering or turning at an intersection without first checking for cyclists;
• Ignoring a cyclist’s right of way;
• Opening a car door into an oncoming cyclist’s path.