Totally agree with the sprawl issue, but I cannot see why we have to make one more of transportation worse to make another better. Not everyone can ride a bike. Either because of their physical ability or because of the for they'd need to travel. Europe has better bike lanes and higher speed limits for cars. We can have our cake and eat it too. Let's get rid of the sprawl, add some decent public transit and prohibit cars in city centers and we get somewhere. The sprawl that's subsidised by everyone is the root of all Urban planning problems in the US.