My buddy with no arms or legs would beg to differ. He can't afford taxis because he can't work a real job. His friends/family can't drive him around because you need a custom vehicle for his chair. But he can use bike lanes and sidewalks independently without too muuch trouble.

Car-dependent sprawl creates mobility impaired people where there were previously none. Many people are too old, too young, too intoxicated, too vision impaired or too poor to drive. Lack of viable transportation options is the greatest barrier to upward economic mobility for Americans today.