My commute is 10 miles (16 km) one way if I take the shortest route. That's most of the way on a two lane highway with no shoulders and high speed traffic. Not too bad in the morning when the traffic is light. It's pretty open, and out on the prairies here we tend to get some fairly windy days so that can affect my times quite a bit. An alternate route is a little longer but on a four lane highway with a lower speed limit (go figure), but still no paved shoulders. I can cut off of this highway and take a small paved road along the river, with a paved bike lane and the pavement was redone only a couple of years ago. This part is my favourite local ride, and I'll frequently go past my destination just to put on a few more kilometers before I go in to work (provided I can get myself out of bed early enough!). I usually end up commuting only two or three days a week, due to other commitments before or after work, where clothes, lack of shower facilities etc. are an issue. The days I do ride in though are great. There are a couple of other guys I work with that ride in occasionally, and almost everyone on our staff of 10 rides at least recreationally, and one guy is a pretty serious MTB racer. It's a very good atmoshpere at work for anyone involved with fitness activities, as we've got a weight room we equipped ourselves, and an older road bike on a trainer we can use on breaks. The company provided us with a room to use, and we have showers as well. The weather is finally breaking, although there is snow in the forcast for tomorrow, so the commuting will start again soon. Can't wait!