I used 220 grit sandpaper for streets and 1/8" Masonite hardboard for sidewalks. Expansion grooves in the sidewalks were scribed with a sharp X-Acto knife and colored with a very sharp lead pencil. Sidewalk color was just a mix of black, white, tan, and yellow craft paints that sort of matched a piece of concrete chipped out of a city sidewalk.
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