All products and services that are normally used for the construction of highways and ancillary structures on the UK Strategic Trunk Road Network.

Design Manual for Roads and Bridges.

CD 534 - Chamber tops and gully tops for road drainage and services

The Design Manual for Roads and Bridges is the basis of the requirements used by the Highways Agency for the design of new highway construction works and maintenance on the UK Strategic Trunk Road Network.

CD 534 sets out the needs of the Overseeing Organisation with respect to design and construction of the chamber and gully tops for road drainage.