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DMRB: Road Layout 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

Publication Year

2020

Document Status

Withdrawn

Abstract

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

Document History

Superseded by CD 123 Geometric design of at-grade priority and signal-controlled junctions (formerly TD 41/95, TD 42/95, TD 40/94, and those parts of TD 50/04 and TD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 (NHW, 2021). Road Layout. Design. 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. Revision 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. Revision 1 - January 2020: updates references. 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. Revision 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.

Publisher Information

Highways England

Highways England is now known as National Highways and was responsible for the operation, maintenance and improvement of England's motorways and major A roads. It was an executive non-departmental public body, sponsored by the Department for Transport and was formerly known as Highways Agency.

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

Website: www.highways.gov.uk
Email: info@highwaysengland.co.uk
Tel: 0300 123 5000