I was commuting to work yesterday and it was raining pretty heavily. I round a corner and see the cops had one lane shut and were literally pulling over every car that was going on that road and were administering RBT's (it's not a hugely busy road). I thought, here we go, I'm going to have to take my helmet off and sit here waiting and get wet - I wear pants, shirt and tie under my bike gear which is good for short stints in the rain but that is about it. They pulled everyone over and waved me through. Very considerate! Moral of the story - if you are going to drink drive - take your bike.