Transport Michigan has an interesting piece advocating center running light rail for Woodward Avenue. The article has some great history of the street:
Woodward got its start as an Indian footpath. But its major contribution to the development of transportation technology came in the twentieth century, when it served as a testing strip for the roadway infrastructure that would define the automobile era. Another rubber-tired vehicle - the bicycle - helped pave the way for Woodward's transformation into the quintessential American artery for cars. The world's very first mile of concrete highway was laid along Woodward in 1909, and opened by former League of American Wheelmen leader Edward Hines. The first three-color traffic light followed in 1919.
Photo via Ifmuth