General

S7.7.1: Where the surface of the concrete road slab or the modular surface layer is overlaid with a bituminous material or surface treatment, a matching thickness of a similar or equivalent material must be laid.
S7.7.2: Wherever practicable, the required surface course thickness should be maintained by adjustment of the binder course thickness. The surface course and binder course materials must not be laid to a thickness less than that required by A2 or A3 for the nominal size of each material laid.
S7.7.3: Where the surface of the concrete road slab or modular surface has had a surface treatment including overlay, an equivalent surface treatment or overlay must be applied.