Yesterday on my way back from the thrift store I was passed by another cyclist. This is nothing new, I'm kind of slow, people pass me all the time. But what struck me was our difference in lane positions. While I ride inside what would be a cars passenger side tire track (sometimes even further to the left) the guy who passed me rode right on the white line.
Now in metro Atlanta most roads do not have shoulders; so for my safety I take the lane, but I'm in the minority. Most cyclist I see ride almost on top of the white line. Now if there is a shoulder and it's sufficiently wide (at least two handlebar widths) I will use it, otherwise I'm out in the lane forcing cars to go around me. So how about you? Where do you ride?