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. Single Lane (for Shuttle Working): this sign should be used to indicate that a length of road is operating with a single lane of traffic where the opposing traffic is either stopped or diverted. It is intended to reassure road users that they will not encounter oncoming traffic.