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DMRB: Pavement CD 225 Version 1.1.0 Design for new pavement foundations (formerly IAN 73/06 revision 1 (2009), HD 25/94). Version 1.1.0
Publication Year
2025
Document Status
Current
Abstract
Outlines the design requirements for pavement foundations, covering subgrade assessment, foundation designs, performance procedures and design outputs.
Document History
Pavement. Design. Supersedes CD 225 Revision 1. Design for new pavement foundations (formerly IAN 73/06 revision 1 (2009), HD 25/94). Revision 1 (HE, 2020). Revision 0 dated March 2020 - replaces IAN 73/06 Revision 1 (2009) and HD 25/94. Revision 1 dated April 2020 - clarification re-laid function tables. Version 1.1.0 - dated September 2025. Incremental changes to requirements, based on 5 years experience of using CD 225 and cyclic review.
Publisher Information
National Highways
National Highways is an executive non-departmental public body, sponsored by the Department for Transport. It has responsibility for operating, maintaining and improving motorways and major A roads in England. Formerly known as Highways England, between 2015-2021 and Highways Agency, between 1994-2015.
National Traffic Operations Centre
3 Ridgeway
Quinton Business Park
Birmingham
NHW
UK
Website: https://www.gov.uk/government/organisations/national-highways
Email: info@nationalhighways.co.uk
Tel: 0300 123 5000
