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

Publication Year

2021

Document Status

Current

Abstract

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

Document 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

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