Highways England Staff Great Britain

• Design Manual for Roads and Bridges : Vol. 3 : Highway Structures : Inspection and Maintenance, Section 4 : Assessment, Part 14 BD 44/15
• Design Manual for Roads and Bridges : Vol. 6 : Road Geometry, Section 3 : Highway Features, Part 4
• Design Manual for Roads and Bridges : Vol. 7 : Pavement Design and Maintenance, Section 5 : Surfacing and Surfacing Materials, Part 3