My commute is about 15 miles through 1st and 2nd tier suburbs (from one suburb to another). Mostly residential streets, with some industrial and commercial areas and sometimes I go through a regional park. I ride an old no-name road bike (early '80s) built from Ishiwata 022. I think it might be an outsourced Trek as the specs are the same as the 510 from 1981 and the bike shop owner who sold me the frameset (in 1989) said it was made in Green Bay. I use a rack and fenders and bar-end shifting. I carry the day's work clothes in a pannier. I generally take about an hour but I made it home in 45 minutes one evening when lightning was giving me a bit of extra adrenaline