Other tools NBS offers a range of tools for specification and collaboration National BIM Library The most trusted BIM Library in the UK, certified to the internationally-recognised NBS BIM Object Standard Uniclass 2015 A dynamic and unified classification system for the construction industry covering all sectors Construction Information Service (CIS) A comprehensive online collection of construction related standards, regulations, technical advice and articles Plug-ins NBS provides a range of tools to help connect your CAD model to your specification model
Platform Resources Support Events About TheNBS.com Manufacturers Uniclass 2015 Get in touch

Platform

NBS Chorus Features and pricing Book a demonstration Sign in to NBS Chorus Other tools National BIM Library Uniclass 2015 Construction Information Service (CIS) Plug-ins

Resources

Knowledge Sample Specification Case studies Authors

Support

Training Downloads and updates

About

About NBS Newsroom

Platform

NBS Chorus Features and pricing Book a demonstration Sign in to NBS Chorus Other tools National BIM Library Uniclass 2015 Construction Information Service (CIS) Plug-ins

Resources

Knowledge Sample Specification Case studies Authors

Support

Training Downloads and updates

About

About NBS Newsroom
Download from CIS *
* A valid subscription to The Construction Information Service is required to download this document.

Click here to find out how to access this document

DMRB: Road Layout CD 122 Geometric design of grade separated junctions (formerly TD 22/06, TD 39/94, TD 40/94). Version 1.1.1

Publication Year

2022

Document Status

Current

Abstract

Details requirements for geometric design of grade separated junctions, focussing on the form, merges and diverges, waving and spacing, and connector roads.

Document 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

Publisher Information

National Highways

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.

National Traffic Operations Centre
3 Ridgeway
Quinton Business Park
Birmingham
NHW
UK

Website: https://www.gov.uk/government/organisations/highways-england
Email: info@highwaysengland.co.uk
Tel: 0300 123 5000