Geometric design of grade separated junctions (formerly TD 22/06, TD 39/94, TD 40/94). Version 1.1.1
DMRB: Road Layout CD 122
Document Status
Current
Supplement
Civil & Structural Supplement
Series
DMRB: Road Layout
Abstract
Details requirements for geometric design of grade separated junctions, focussing on the form, merges and diverges, waving and spacing, and connector roads.
History
Road layout. Design. Supersedes CD 122 Geometric design of grade separated junctions (formerly TD 22/06, TD 39/94, TD 40/94). Version 1.1.0 (NHW, 2021). Supersedes: TD 22/06 Road Geometry. Junctions. Layout of grade separated junctions (HA, 2006) TD 39/94 Road Geometry. Junctions. Design of major interchanges (HA, 1994) TD 40/94 Road Geometry. Junctions. Layout of compact grade separated junctions (HA, 1994) Design manual for roads and bridges, DMRB. CD 122 Version 0 - August 2019. CD 122 Version 1 - January 2020: Updates references. CD 122 Version 1.1.0 - November 2021 - changes made to core document, England NAA. CD 122 Version 1.1.1 - January 2022 - changes made to core document, minor editorial changes to correct alignments in Tables 3.21 and 3.32
Subjects
- Roads
- Civil engineering, infrastructure and public utilities
- Transport facilities
- Road layout
Publisher History
National Highways is a government company, with responsibility for operating, maintaining and improving motorways and major A roads in England. It works with the Department for Transport and was previously known as Highways England and Highways Agency.
Information
NBS
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
Accuris
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