It's by a yank, but is pretty relevant to here.  Have a read.

An extract :

My goal is to stay in control of my emotions. When a bad driver cuts me off because he is not paying attention or checking his mirrors, I am able to stay cool. Let someone else ‘teach him a lesson’-whatever I have to tell myself to get through those first critical moments without reacting. In those cases where it seems the bad and dangerous driving was intentionally directed at me-it is very difficult for me to control my knee jerk response to retaliate immediately. It feels like I am ‘giving in’ or in some other way ‘losing’. In order to change my reaction I had to change my perspective. If I lose my temper and escalate an antagonistic situation- what I am really doing is losing control. I try to equate losing my temper with being defeated, with ‘losing’. For me this is often enough to deter my dark side from emerging.