Especially here in Texas.  Most of it was developed in the 60's.  (It was too hot down here for most people, until the home AC unit became cost effective.  Once that happened people started to move here.)  Since most of the infrastructure was built up then, and Texas has a lot of land.  Nothing was built close together.  I remember being in High School and Mom had to drive 15 miles to a grocery store.  It isn't like that today, but public transportation wouldn't work there.   I know I cannot get public transportation from my house to work unless I call a cab.  It just doesn't exist in this small town.