I've attached a .png file showing a segment of "concrete" highway that I modeled using Gimp (an open-source Photoshop workalike) and a photograph of a small patch of my concrete driveway. Printed with an InkJet on matte photo paper or sanded styrene sheet, this can be used produce a very realistic model of a concrete road when glued down on a smooth surface like Masonite, especially if your "road" will be viewed from a few feet distant.