Personally, I think that the mayor is hitting a single with this one, and moving a runner into scoring position.
He said that he's against the tolls - this will give him some credibility witht the teapartiers and repubs that are against the tolls per the tax raise a decade ago.
He qualified by saying that he's also against the road in general - this will give him some credibility with the left and the centrists that are already against sprawl.
Whether or not Tallahassee will agree with his position and kill it or goes ahead with the project anyway is out of his hands, but he made his stand and I am fully on board with him. If the project tanks and he can take some responsibility for it, even better.