You're trying harder than the vast majority of the population. Keep it up, and maybe over time you'll refine your system to bike full time. But even if you stick with the car+bike solution, you are making a difference. If you're interested in saving time AND gas, check out Vectrix scooters. I'm getting one as soon as they ship out in 2006, and I think at that point I'll be able to forever put away my car keys.