Asphaltic Materials e.g. Surface courses for use on the Welsh Motorway and Trunk Road Network.
Welsh Government Procedure and Advice Guidance 112/20: Stone Mastic Asphalt (SMA) Specification.
The Design Manual for Roads and Bridges Volume 7, Section 5, Part 1 CD236 – Surface Course Materials for Construction Welsh Government National Application Annex, along with the Manual Contract Documents for Highways Works 900 series, sets the requirements for the construction and maintenance of Trunk Roads in the United Kingdom.
Devolved administrations within the UK incorporate certain amendments to take account of local conditions.
This Welsh Government Procedure and Advice Guidance provides improved specification and guidance for SMA surface course materials for use on the Welsh Motorway and Trunk Road Network.