Planetizen blogger Michael Lewyn writes about the triangulation of transportation politics these days: the road lobby, the environmental/transit coalition, and the anti-tax/anti-spending conservatives at the federal and state levels. And he discusses the strange case of his hometown Atlanta where, he speculates, the road lobby and transit advocates could have won if they'd been unified, but instead were defeated by a coalition of groups as diverse as the Tea Party, Sierra Club and NAACP. Read more.