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
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
- 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
We connect trusted knowledge to customers' workflows – mitigating risk, increasing efficiency and accelerating innovation For more than 60 years, leading R&D and engineering-intensive organizations have relied on us to achieve on-time, on-budget delivery of complex projects and new products. We deliver an unparalleled combination of technical content and Artificial Intelligence (AI) technologies to surface answers from the vast universe of technical knowledge, both inside and outside the organization. In a single interface, we connect the dots between information scattered across many different sources, allowing technical professionals to make better, more informed decisions faster.