Sure, for a small area that's fine, but if you're talking about the entire island of Manhattan that's a problem. I suppose if you made say every 20th street op

Sure, for a small area that's fine, but if you're talking about the entire island of Manhattan that's a problem. I suppose if you made say every 20th street open to one way single street traffic (so 20th goes west, 40th east, 60th west etc), and every even avenue open (2nd south, 4th north, 6th south), that could work