PPS 17 Control of Outdoor Advertisements·Page 10·2.11
Prohibition on resembling traffic signs
It is an offence to display any sign which resembles a traffic sign on or near a public road.
Article 34 of the Road Traffic Regulation (Northern Ireland) Order 1997 makes it an offence to display any sign which resembles a traffic sign on or near a public road.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/PPS 17 - Control of Outdoor Advertisements.pdf