I put campus style pedals on my commuter bike too. Finding the right side sometimes takes a second or two, not a big deal.

My reasoning in choosing campus style was less about traffic (though that was part of it) than thinking I might want to go somewhere on my lunch hour, just a quick errand, and not want to switch into my bike shoes. Turns out I so prefer to be clipped in, now that i've gotten comfortable with it, that I never skip my bike shoes. I may put double sided pedals on the commuter bike one of these days because of that.