Bi-Directional Hazard Board, with a Class 1 reflective finish. Measuring 1800 x 300 mm in size. Bi-directional hazard markers feature a black and white chevron pointing in both directions, and are commonly used where the road forks. The can be used to delineate an island or other kinds of obstructions in the roadway, indicating that traffic can pass either side of the island or obstruction. This hazard board sign is 1800 mm long and 300 mm high and finished with Class 1 reflective film.