I just returned from trip to Seattle, Washington. I found cheap flights and decided to explore this city. I think it's easiest to live without car in this city. I think in the U.S., there are two categories of cities for carless travel. First, there are the larger, older U.S. cities like New York, Washington, D.C., Chicago, and San Francisco, and second are cities such as Minneapolis, Portland, Seattle, Denver, and even Los Angeles, which have begun building or enhancing public transportation systems and bike lane networks in the last decade