Belfast·SPG008 Advertising and Signage·Page 15·4.6.2(g)
Signs resembling traffic signs or directional elements
Signs that resemble traffic signs by colour or content, or incorporate directional or other traffic elements that could cause confusion, may be refused.
Those which resemble traffic signs because of their colour or content or those which embody directional or other traffic elements, and which could therefore cause confusion with traffic signs.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/belfast/SPG008 Advertising and Signage.pdf