You know, I learnt a lot from this piece. I have had several road rage episodes (as much on the tarmac as in the ships — relation/friend) and just as you described, it does help you to regain bliss and equilibrium — provided you dont end up causing damage. That silent cussing, even when unheard by the other helps.
I agree again that the best way to heal from the issues on road and ship is to try another. This analogy is simply fantastic.

Lesson learnt.