Geometric design of roundabouts (formerly TD 16/07, TD 50/04, TD 51/17, TD 54/07, TA 23/81, TA 78/97, TA 86/03, TD 70/08). Version 2.1.0
DMRB: Road Layout CD 116 Version 2.1.0
Document Status
Current
Supplement
Civil & Structural Supplement
Series
DMRB: Road Layout
Abstract
Provides design requirements for roundabouts, covering types, design features, signal-controlled roundabouts, mini-roundabouts, segregated turns and lanes, subsidiary deflection islands, and designing for pedestrians, cyclists and equestrians.
History
Supersedes CD 116 Version 2.1.0 Geometric design of roundabouts (formerly TD 16/07, TD 50/04, TD 51/17, TD 54/07, TA 23/81, TA 78/97, TA 86/03, TD 70/08). Version 2.1.0 (HE, 2023). Road Layout. Design. Supersedes CD 116 Revision 1 Road layout. Design. Geometric design of roundabouts (formerly TD 16/07, TD 50/04, TD 51/17, TD 54/07, TA 23/81, TA 78/97, TA 86/03, TD 70/08). Revision 1 (HE, 2020), and TD 16/07 Road Geometry. Junctions. Geometric design of roundabouts (HA, 2007), TD 51/17 Road Geometry. Highway Features. Segregated left turn lanes and subsidiary deflection islands at roundabouts (HE, 2017), TD 54/07 Road Geometry. Junctions. Design of mini-roundabouts (HA, 2007), and TA 78/97 Road Geometry. Junctions. Design of road markings at roundabouts (HA, 1997), TD 50/04 Road Geometry. Junctions. Geometric layout of signal-controlled junctions and signalised roundabouts (includes correction dated February 2005) (HA, 2004), TA 23/81 Road Geometry. Junctions. Junctions and accesses: determination of size of roundabouts and major/minor junctions (HA, 1988), TA 86/03 Road Geometry. Junctions. Layout of large signal controlled junctions (HA, 2003), and TD 70/08 Road geometry. Links. Design of wide single 2+1 roads (HA, 2008). Design manual for roads and bridges (DMRB). Version 0 dated July 2019. Version 1 dated March 2020 - updates references. Version 2 dated April 2020 - Figure 1.2 updated. Version 2.1.0 dated May 2023 - changes made to Core document, England NAAA, Northern Ireland NAAA, Scotland NAAA and Wales NAAA, with incremental change to requirements.
Subjects
- Civil engineering, infrastructure and public utilities
- Transport facilities
- Road layout
- Roads
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
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