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Distance 		Minimum Required
Letter Height

100 ft.

4 inches

250 ft.

10 inches

360 ft. (city block)

16 inches

500 ft.

22 inches

750 ft.

33 inches

1000 ft.

43 inches

1320 ft. (1/4 mile)

57 inches

This letter visibility chart has been made for you based upon information provided by Pennsylvania Transportation Institute, Penn State University and the United States Sign Council (USSC). c1998