Tufte describes the effectiveness of layering and separation. With designers using different elements such as colors, lines, and symbols it helps enhance what needs to be drawn out and what doesn't. On page 56 Tufte includes a map in his reading. The map in the picture is not overwhelming or creating to much noise (which is something Tufte emphasis while describing the rules and effectiveness in layering and separation. Things such as included road maps had to be clear, simple, and concise because that was how a person got from point A to point B. If the designer had put a lot of clutter into the map it would have been made ineffective and therefor useless.