My commute is 18 miles 1 way. I ride between 2-6 trips per week. Takes between 1.15 to 1.5 hours per trip. Darkness, rain, snow and cold slow me down. I need my car for work, so that's where its stays during the week. Ride home at night, ride back the next morning. Takes me an hour to drive, pedaled 2,000 miles last year on just the commute. That added up to 48 lbs of weight in calories burned. I might have lost 10.