Must be used to provide advance warning of a detour. TC 105 must be used on roadways with more than two lanes. MTO Book Location: Book 7, Pg. 141 Reflective Engineering GradeHi-IntensityDiamond Grade Substrate AluminumPlywood Size 120cm x 120cm (48" x 48")90cm x 90cm (36" x 36")180cm x 180cm ( 72" x 72") Quantity Add to Quote