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Geometric design of at-grade priority and signal-controlled junctions (formerly TD 41/95, TD 42/95, TD 40/94, and those parts of TD 50/04 and TD 70/08 relating to priority and signal-controlled junctions). Version 2.1.0

DMRB: Road Layout CD 123

Geometric design of at-grade priority and signal-controlled junctions (formerly TD 41/95, TD 42/95, TD 40/94, and those parts of TD 50/04 and TD 70/08 relating to priority and signal-controlled junctions). Version 2.1.0

Document Status

Current

Supplement

Civil & Structural Supplement

Series

DMRB: Road Layout

Abstract

Gives requirements for at-grade priority and signal-controlled junctions, looking at selection, visibility, direct access, and major road central treatment.

History

Road Layout. Design. Supersedes CD 123 Revision 2 Geometric design of at-grade priority and signal-controlled junctions (formerly TD 41/95, TD 42/95, TD 40/94, and those parts of TD 50/04 and TD 70/08 relating to priority and signal-controlled junctions). Revision 2 (HE, 2020). Replaces CD 123 Revision 1 Road layout. Design. Geometric design of at-grade priority and signal-controlled junctions (formerly TD 41/95, TD 42/95, TD 40/94, and those parts of TD 50/04 and TD 70/08 relating to priority and signal-controlled junctions). Revision 1 (HE, 2019). Supersedes: TD 41/95 Road Geometry. Junctions. Vehicular access to all purpose trunk roads (HA, 1995) TD 42/95 Road Geometry. Junctions. Geometric design of major/minor priority junctions (HA, 1995) TD 40/94 Road Geometry. Junctions. Layout of compact grade separated junctions (HA, 1994) TD 50/04 Road Geometry. Junctions. Geometric layout of signal-controlled junctions and signalised roundabouts (includes correction dated February 2005) (HA, 2004) TD 70/08 Road geometry. Links. Design of wide single 2+1 roads (HA, 2008) Design manual for roads and bridges, DMRB. Version 0 - August 2019 replaces TD 40/94, TD 41/95, TD 42/95, TD 50/04 and those elements of TD 70/08 relating to priority and signal-controlled junctions. Version 1 - January 2020: updates references. Version 1 correction - June 2020 - CD 123 Revision 1 has been replaced to correct reference to CD 169 in Clause 2.4 Note 2, from the January 2020 update. Version 2 - Aug 2020 - Revision 2 (August 2020) To correct issue with incorrect reference being added to clause 2.4 NOTE 2 as part of January 2020 update. Correct reference is CD 169. Version 2.1.0 - November 2021 - changes made to core document

Subjects

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.

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IHS Markit is a leading global source of critical information and insight for customers in a broad range of industries. Our customer product and service solutions span four major areas of information: energy, product lifecycle management, environmental and security. By focusing on our customers first, we deliver data and expertise that enable innovative and successful decision-making. Customers range from governments and multinational companies to smaller companies and technical professionals in more than 180 countries. IHS has been in business since 1959 and employs more than 3,500 people in 35 locations around the world.

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