Welsh Government traffic officer
Welsh Government traffic officers (Welsh: Swyddog Traffig y Llywodraeth Cymru) are civilian staff employed by the trunk road agents on behalf of the Welsh Government as a means to ease traffic congestion on major trunk roads in Wales. Their role and powers are similar to their English counterparts working for National Highways, the National Highways traffic officers.
Source: Wikipedia — Welsh Government traffic officer (CC BY-SA 4.0)