It changes the amplitude of the difference, it makes the contrast more and more clear and it expands the dimension of what we can consider a "city center". I c

It changes the amplitude of the difference, it makes the contrast more and more clear and it expands the dimension of what we can consider a "city center". I could live carless in Boston when I was living in Cambridge or downtown Boston. I could not make that if I wanted to live in Medford, even though that is a bare 10-minute drive from Cambridge. A fleet of self-driving cars could be spread around more efficiently in metro areas and suburbs.