All signs are manufactured in accordance with Chapter 8 of the Traffic Signs Manual Ireland, which outlines the standards in temporary traffic management in Ireland. All Chapter 8 roadworks signs are to be RA2 face material. The chapter specifies the requirements for the use of temporary traffic control measures, such as signs, barriers and cones, in roadworks and other temporary traffic management situations. Road Closed: this sign should only be used in conjunction with WK 001 when a road has been closed to facilitate roadworks.