more ribs 50 extending lengthwise of the plate as shown in fig1 4 the plate 14 can further comprise a friction enhancing material and or a textured pattern 52 on the upper surface such as knurling to provide grip and or an aesthetic appearance one or more surfaces of the plate 14 can further comprise a photoluminescent or u201c glow in the dark u201d material such as the photoluminescent strips 54 shown in fig1 and 4 one or more surfaces of the plate 14 can also comprise a friction enhancing material such as the strips 56 shown in fig1 and 4 the photoluminescent material and or the friction enhancing material can comprise strips of material inserted into mating receptacles in the plate 14 between the ribs 50 these materials can comprise a spray on substance adhesive strips or other materials coupled to the plate in addition various surfaces of the plate 14 can be coated or painted to provide desirable properties such as aesthetic appearance on some exemplary embodiments the upper and or lower surfaces of the plate 14 are painted such as black or yellow yellow paint for example can provide a visual alert and or contrast with other materials to signify the edge of a step in.