Standards for Highways has updated a significant set of its requirements for manhole covers and gully grates installed on the road network, for which it is responsible. The document in question is CD 534, which was first released in February 2020 and has now been updated to version 0.2.0 as of September 2025.
CD 534 initially replaced HA 104/09 and forms part of the Standards for Highways Design Manual for Roads and Bridges (DMRB). CD 534 equally applies to the network managed by Transport for Scotland.
While this revision refines structure and guidance, particularly around chamber positioning and the removal of units from pathway locations, its core principles on ironwork design, performance and compliance remain consistent with previous editions.
Take a look at the full standard