Road signs are installed by the Highway Authority to regulate, advise and give directional information to the road user. The Highway Code gives example of the most common signs in normal use. All traffic signs on public roads must be as prescribed in the Traffic Signs Manual, or specifically authorised by the Department for Transport.
Signs fall into certain groups:
All signs on the highway must be authorised by the Authority. Special signs are allowed with prior approval of the Department for Transport, or if they are experimental and under trial.
