Tapezord, many of the lights in Detroit are being removed because the streets do not handle nearly as many cars as they used to. That's why you see flashing lights, or even lights that have been turned off completely in many neighborhoods.
That said, the main roads here are also too wide. There's no need for Woodward, Gratiot, or Michigan to be as wide as they are. However, their width would come in handy if Detroit ever implemented a light rail system. Michigan will be narrowed to 2 lanes of travel in each direction, with diagonal parking on the side...I believe that is set to happen next year. Corktown settled on stamped concrete to mimic the character of the bricks...because as nice as the bricks are, they really suck to drive on.