What effects can strong emotions have on your ability to drive?

You need to be able to multitask when you drive.  When strong emotions are affecting you, you may only be able to focus on that.

When driving, you need to have your full attention on the road and on your surroundings, for your safety and the safety of others. Strong emotions not only take your attention away from driving, but they also affect your decision-making skills and keep you from judging and reasoning accurately. Driving while affected by strong emotions can be just as dangerous as driving while drowsy or drunk, you will be distracted by other things and not have the right mindset to drive.

Hope this helps! :)