Cattle Grid Ahead Post Mounted Sign - 552 R2/RA2 (Face Only)Public roads containing a cattle grid must be marked with Cattle Grid Signage. Driving over a cattle grid at speed or off guard may cause a car to lose control, and are especially dangerous for two wheeled vehicles. By ensuring that the correct signage is used accidents can be avoided. The sign should be sited at the standard distance from the hazard, sited in Appendix A of the Traffic Signs Manual, Chapter 4. This sign is made from road grade