>Not every city is laid out according to sound urban planning principles, or they have been remodeled and reshaped to accommodate and prioritize car traffic. Ma

>Not every city is laid out according to sound urban planning principles, or they have been remodeled and reshaped to accommodate and prioritize car traffic. Many American cities, for example, are organized around the assumption that people will be driving, to the detriment of other modes of transportation. In addition, plenty of climates in the US don't allow for walking, no matter how the city is laid out. You aren't walking anywhere remotely distant in Las Vegas or Phoenix or other parts of the Southwest in the summer, when temperatures routinely soar over 110 degrees (with blazing sun), unless you want someone to find your shriveled husk of a corpse on the side of the road. Similarly, you aren't walking anywhere in huge portions of the North/central/northeastern parts of the US in the winter, when temperatures plummet below zero and blizzards and ice storms occur frequently. Even in areas where the weather and the city layout is amenable to walking, there are tens of millions of elderly, disabled and/or morbidly obese Americans that lack the capacity to walk any significant distance at all.