This will be the old city.
It's just a piece of blueboard insulation with a slight
elevated part in the upper right corner that will be a
parking lot for a mini-mart.
This is how I plan to have my
buildings placed.  I've marked
approximately where I would
like the roads to go.
Here I have constructed a template of my
road out of construction paper.  This tells me
exactly where my roads will go.
I have drawn the outline of the road system,
using the paper template as a guide, onto the
plastic sheet.  Placing the sheet on to the layout,
I traced the whole area that encompassed any
parking lots, side streets and driveways that I
found.  It's bigger than the template and you'll
see why!