A preformed road marking suitable for heat bonding to the surface on which it is to be laid withoutthe use of adhesive comprises a body of a thermoplastic material which can be thermoset more than once and incorporates a reinforcement in or on the body. The reinforcement may be in the form of individual strands, or mesh, or a film or coating selected so that the effectiveness of the marking is not impaired. Advan- tageouslythe reinforcement is removed, for example by melting, during laying to the surface.
The use of the reinforcement in the marking holds the marking together in the event of cracing or shattering and during handling and it enables sections of marking to be folded for packing and unfolded and laid with ease on arrival at the marking site.