Matt, for my concrete streets I use foam core, thin as you can buy, then put in lines, gently with exact knife, and cracks, then paint with concrete color paint. After dry find a dusty place get lots of dust on your finger and rub it on the concrete and the fine dust will fill in the marks made by the knife. Then add evergreen sidewalks where required. Paint them a little lighter than main roadway. Add marks tire marks etc to main road and added details to side walk. For gravel roads I lay the foamcore, again using very thin, or thin cardboard, then blue, a wider piece than the foam core board, fine sandpaper. Make sure that the sandpaper is wider than the road so you can glue it down to the main table area to give you the gravel edge appearance. With this edge, after glue dries you can push the foam core down with your fingers to put in contours, then lightly drybrush a light brown or beige, I prefer beige paint then sprinkle fine sand on top, very sparing ly, then detail with chalks. For ashpault roads I again use foam core, spakle edges to give contour and you can also use finger to push in depressions etc. Cut in crack lines with knife and paint with your preferance of paint. Fill in crack lines with a mixture of white glue and black paint, wait unitl all is dry then use dry brushing and chalks to add texture and marks. Ron..
