we call it filtering in the UK and I'm sure as hell not hanging about in the pouring rain in a traffic jam if I have any choice! Loads of people have commuting bikes here just for that - so they don't have to sit in traffic. Although I did have a woman turn into me one time and catch my arm - she looked a bit psycho so I decided just to ride on! Only time I won't do it is between buses or trucks on windy days - that's bad news! I do it most days though - part of the fun of biking
