After some delay in getting the project moving, I've finally begun to start the scenery beginning with "Main Street." For the road base, I decided to use Darice "Foamies" with a thickness of 6 mm. The 6 mm, rather than the 2 mm, brings the road up higher against the curbing of the Main Street buildings in the picture. I've experimented with using Rustoleum "Aged Iron" spray paint as a surface paint over the foam. This application gave a realistic road surface...a little raised and rough. Once the road construction moves out of the Main Street area, away from the MTH buildings with high curbs, I'll use the 2 mm Darice Foamie product. I'm gluing it down with the least expensive Liquid Nails product, without issue.
I'm testing a second road covering suggested in a video found on line, where the hobbyist used a product from Wal-Mart labeled "Apple Barrel" Matte Acrylic Paint in the color "Pavement." According to the hobbyist, after applying with a brush, the next step is to run a fine sandpaper over the "Pavement" color to rough up the surface. After the first coat and before sanding, the road resembles a newly paved road before the wear...flat black color and smooth surface.
The Apple Barrel paint goes on smoothly and dries quickly. I purchased the striping product from Red Lion on E Bay. The striping appears to be adhering better to the Foamie painted with Apple Barrel Pavement, rather than the rougher Rustoleum spray. I'll follow-up more later.
Many thanks to HMORGAN posting above for guiding me toward the correct Darice product and all the other contributors on this thread noting many different approaches and methods for road and highway building...all looking great.