It includes all current standards, advice notes and other documents relating to the design, assessment and operation of trunk roads, including motorways. Pavement. Design Manual for Roads and Bridges. Document History Superseded by CD 225 Technical approval of highway structures (formerly BD 2/12) (HE, 2020). It does not include the estimation of design traffic (covered in HD 24/94), nor does it cover the design of pavement foundations … This approach provides a 'standard foundation' for the design of the pavement. Old series - DMRB Departmental Standards (Highways). Abstract. Design. It reviews the principles of design which have been used as well as mentioning the cost implications and those environmental considerations which most closely affect pavement design. The foundation for the purpose of these pages is defined as the sub-base and any associated strengthening materials used. Details the requirements used in the design of pavement foundations, including subgrade assessment and procedures for performance. Supersedes the October 2003 version of the NRA Addendum to TD 25/94 and the January 2005 version of the NRA Addendum to TD 26/01. DMRB: Pavement. See HA IAN 73/06. DMRB: Pavement. This approach provides a 'standard foundation' for the design of the pavement. FOUNDATION DESIGN 4.1 General The condition of foundation support is a crucial factor to be considered while designing a pavement structure. Pavement design and construction. Foundations (HA, 1994) and IAN 73/06 Design guidance for road pavement foundations (draft HD 25) (Revision 1 (2009)) (HA, 2006). Page 1, Item 1, last line: Design. 1 October 2003 NRA Addendum to HD 25/94 – Pavement Design and Maintenance: Foundations – dated December 2000 is amended as follows: 1. Revision 1 (HE, 2020). RD/GN/042 Pavement Design for Carriageway Construction Page 8 of 42 4. Superseded by CD 225 Revision 1 Design for new pavement foundations (formerly IAN 73/06 revision 1 (2009), HD 25/94). Abstract. Pavement. Details the requirements used in the design of pavement foundations, including subgrade assessment and procedures for performance. The DMRB was introduced in 1992 in England and Wales, and later in Scotland and Northern Ireland. Design Manual for Roads and Bridges Part 2 HD 25/94 Erratum October 2003 1 NRA ADDENDUM TO HD 25/94 PAVEMENT DESIGN AND MAINTENANCE FOUNDATIONS ERRATUM No. The standard practice is to design the foundation for construction traffic loading. History. DMRB Volume 7 Section 2 Part 2 (HD 25/94) Pavement design and maintenance. History. Pavement Design - Foundation Design. The Purpose of the foundation is to transfer the loading from the road to the soil or subgrade. Pavement designs for other roads where the design loading is less than 100 cv/d should be taken from Transport Research Laboratory reports LR 1132 (see IRRD 280375) and RR 87 (see IRRD 803973) except in Nothern Ireland, which has its own design standards for minor roads. ISBN 0115512306 Supersedes CD 225 Design for new pavement foundations (formerly IAN 73/06 revision 1 (2009), HD 25/94) (HE, 2020) and HD 25/94 Pavement design and maintenance. Foundations (Including NRA addendum - Dec 2000, with Erratum - Oct 2003) Publication Year 1994 Document Status Document History NRA DMRB 7.2.2A. Pavement design and construction. Design manual for roads and bridges (DMRB) 7.2.2. It is intended that the scheme designer should carry out a pavement design based on one foundation design;( sub-base alone or sub-base plus capping layer), and one flexible design for the structural layer Supersedes CD 225 Design for new pavement foundations (formerly IAN 73/06 revision 1 (2009), HD 25/94) (HE, 2020) and HD 25/94 Pavement design and maintenance.