Dan,
You have the area behind the D4 module (the 1x4 labeled City
Scene). I will only be using
three of the 1x4 modules I made for the Carnival, so you can use the
fourth one. You
might also be able to use the triangle behind C8 (unless Rick is using
it). You can probably
also spread some of your cars out on the two 45 degree modules at the
lower left corner
of the diagram (between X3 and E1).
Ira