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DMRB: Drainage CD 525 Revision 1 Design of combined surface and sub-surface drains and management of stone scatter (formerly HD 217/18). Revision 1
Publication Year
2020
Document Status
Current
Abstract
Details requirements and recommendations for the design of combined surface and sub-surface drains, also known as French Drains, used in road drainage systems. Covers the usage of topping materials as a safety feature, alternative filler materials and maintenance and rehabilitation of the drain.
Document History
Drainage. Design. Supersedes CD 525 Design of combined surface and sub‐surface drains and management of stone scatter (formerly HD 217/18) (HE, 2020) and HD 217/18 Geotechnics and drainage. Drainage. Alternative filter media and surface stabilisation techniques for combined surface and sub-surface drains (HE, 2018). Design manual for roads and bridges (DMRB). Revision 0 dated Feb 2020 - replaces HD 217/18. Revision 1 dated Mar 2020 - updates references
Publisher Information
Highways England
Highways England is now known as National Highways and was responsible for the operation, maintenance and improvement of England's motorways and major A roads. It was an executive non-departmental public body, sponsored by the Department for Transport and was formerly known as Highways Agency.
National Traffic Operations Centre
3 Ridgeway
Quinton Business Park
Birmingham
HE
UK
Website: www.highways.gov.uk
Email: info@highwaysengland.co.uk
Tel: 0300 123 5000
