Yesterday was my bike commute #100 year to date. My total commute miles have been 2800, so my average commute for this year has been 28 miles round trip. My average commute time has been 2 hours round trip. Some pretty easy math tells me my average speed per commute is 14 mph. I ride in rolling hilly terrain in suburban Orange County, CA and on average hit a red stop light about once every 2 or 3 miles, so I manage to get some long stretches of uninterrupted pedaling within our megalopolis.