maps

Do you have a favorite high-detail road map of Seattle? With information like "this is an overpass, not an intersection", or "all traffic must turn right here", or "there is a blockade built diagonally across here".

How about a topo map with streets overlaid, for bike route planning? Or actually, I was thinking maybe the way to do the map is with streets colored by steepness, green-yellow-red, and the ground colored by height, maybe blue-gray up to light gray.