In the "Nobel winning physicist takes on Global Warming' thread there were a few posts about bicycle use that I found interesting. I realized that I could use a bicycle rather than an automobile for about 90% of all my travel needs. Living in Portland, the public transportation system is satisfactory and the environment is bicycle friendly. I don't have more than a few miles to travel to work, and there is a supermarket where I could get anything I needed about half a mile to a mile in either direction. I don't have any children to ferry around the city. I could do perfectly well with a bicycle for almost all of my transportation needs and yet I haven't done this. If I sold my car I could save a lot of money. No buying fuel for it, no registration, insurance, or maintenance. That adds up to A LOT of money I could be saving. I've been thinking about getting a bicycle just for some exercise and enjoyment and it never occured to me how practical it can be for me personally. How practical would a bicycle be as a mode of transportation for you?