Alerts drivers to locations where elk crossings are particularly frequent, so that drivers can be proactive in watching for and dealing with these hazards. MTO Book Location: New, Not in Book Reflective Engineering GradeHi-IntensityDiamond Grade Substrate AluminumGalvanized Steel Size 60cm x 60cm (24" x 24")120cm x 120cm (48" x 48")90cm x 90cm (36" x 36") Quantity Add to Quote