Thanks for the concern, Pete. It was designed to handle larger vehicles as well, so I just checked it again with a 57' tiller in AutoCAD Vehicle Tracking, which is a very conservative program, and it makes it through just fine in the directions that would make sense for a responding vehicle. The sharp movements (Yale S to Chapel W, Chapel W to Yale S) would not be logical routes given the location of fire stations in the city and availability of more suitable parallel roads.