>> Build trains...on every single road in existence? Yes. That's effectively what cities had at the turn of the last century. And then they ripped up all the

>> Build trains...on every single road in existence? Yes. That's effectively what cities had at the turn of the last century. And then they ripped up all the tracks or paved them over. They recently did a full depth reconstruction on a street in my neighborhood in Somerville, Massachusetts which entailed digging up the old streetcar rails, ties, and brick substrate from under the pavement.