text: "When I had a car I was always tense. I'm much happier this way," said Heidrun Walter, a media trainer and mother of two, as she walked verdent streets where the swish of bicycles and the chatter of wandering children drown out the occasional distant motor. Sitting in a car to get to work, or any where in fact, restricts how much interaction you have with other people. By walking, or even taking public transportation, you get the chance to run into people you know or meet new people.