Guide to Traffic Management Part 6: Intersections, Interchanges and Crossings Management
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Guide to Traffic Management Part 6: Intersections, Interchanges and Crossings Management Sydney 2020 Guide to Traffic Management Part 6: Intersections, Interchanges and Crossings Management Edition 4.0 prepared by: David Green and Kenneth Lewis, Ann-Marie Head, Publisher Jeanette Ward and Cameron Munro Austroads Ltd. Level 9, 287 Elizabeth Street Edition 4.0 project manager: Richard Delplace and Robyn Davies Sydney NSW 2000 Australia Abstract Phone: +61 2 8265 3300 The Austroads Guide to Traffic Management consists of 13 Parts. It provides [email protected] a comprehensive coverage of traffic management guidance for practitioners www.austroads.com.au involved in traffic engineering, road design and road safety. About Austroads Guide to Traffic Management Part 6: Intersections, Interchanges and Crossings Management is concerned with traffic management at all types of Austroads is the peak organisation of Australasian intersections where road users must join or cross another stream of traffic. It road transport and traffic agencies. focuses on traffic management issues and treatments related to intersections, Austroads’ purpose is to support our member interchanges and crossings. It does not provide information on the geometric organisations to deliver an improved Australasian design of the treatment as this is provided in the Austroads Guide to Road road transport network. To succeed in this task, we Design Part 4, 4A, 4B and 4C. Guidance on the management of road sections undertake leading-edge road and transport which are not part of the intersection or interchange is provided in the research which underpins our input to policy Austroads Guide to Traffic Management Part 5: Link Management. development and published guidance on the Part 6 describes the appropriate use of, and design of, the various design, construction and management of the road intersection types and the techniques that need to be applied if efficient and network and its associated infrastructure. safe intersections are to be provided to the road user. All categories of road Austroads provides a collective approach that use – including cars, trucks, public transport, motorcycles, cyclists and delivers value for money, encourages shared pedestrians, including people who have disability or mobility difficulty, are knowledge and drives consistency for road users. addressed in the Guide. Austroads is governed by a Board consisting of Keywords senior executive representatives from each of its eleven member organisations: Traffic management objectives, intersection type, intersection selection, intersection performance, unsignalised, signalised, roundabout, interchange, • Transport for NSW road user, pedestrians, cyclists, traffic control, road space allocation, lane • Department of Transport Victoria management, functional design, signs and road markings, interchange, ramp layouts, metering, rail crossings, railway crossing, pedestrian crossing, cyclist • Queensland Department of Transport and Main crossing, bicycle paths, bicycle path terminal treatments Roads • Main Roads Western Australia Edition 4.0 published April 2020 • Department of Planning, Transport and Infrastructure South Australia Edition 4.0 of the Guide has been updated with a new name and introduction to better reflect the content. Section 2 was added using existing content to • Department of State Growth Tasmania take into consideration safety and transport management objectives. The • Department of Infrastructure, Planning and content relating to planning and designing for pedestrians has been updated Logistics Northern Territory to reflect good practice. • Transport Canberra and City Services Edition 3.2 published April 2019 Directorate, Australian Capital Territory Edition 3.1 published June 2018 • Department of Infrastructure, Transport, Edition 3.0 published July 2017 Regional Development and Communications Edition 2.0 published April 2013 • Edition 1.0 published November 2007 Australian Local Government Association • New Zealand Transport Agency. © Austroads Ltd 2020 ISBN 978-1-925854-80-0 This work is copyright. Apart from any use as Austroads Project No. NTM6100 and NTM6118 Pages 223 permitted under the Copyright Act 1968, no part Austroads Publication No. AGTM06-20 may be reproduced by any process without the prior written permission of Austroads. This Guide is produced by Austroads as a general guide. Its application is discretionary. Road authorities may vary their practice according to local circumstances and policies. Austroads believes this publication to be correct at the time of printing and does not accept responsibility for any consequences arising from the use of information herein. Readers should rely on their own skill and judgement to apply information to particular issues. Acknowledgements Edition 1.0 prepared by David Bennett, Peter Croft, Gary Veith, James Luk, Peter Freeman, John Bliss, Bruce Howard, Garry Mason and Milan Prodanovic and project managed by Gary Liddle. Edition 2.0 prepared by Michael Levasseur, Peter Croft, David Bennett, Gary Veith, James Luk, Peter Freeman, John Bliss, Bruce Howard, Garry Mason and Milan Prodanovic and project managed by Steve Brown. Edition 3.0 prepared by Lisa Steinmetz and Peter Aumann and project managed by Dave Landmark. Edition 3.2 amendments prepared by Jeanette Ward, Chris Hall, Jamie Robertson, Paul Durdin and Dave Smith and project managed by Jeremy Burdan. Guide to Traffic Management Part 6: Intersections. Interchanges and Crossings Management Contents 1. Introduction ............................................................................................................................................. 1 1.1 Purpose .................................................................................................................................................... 1 1.2 Intended User ........................................................................................................................................... 1 1.3 How to Use ............................................................................................................................................... 1 1.4 Scope ....................................................................................................................................................... 2 1.5 Out of Scope ............................................................................................................................................. 5 2. Safety and Transport Management Objectives ................................................................................... 6 2.1 Safety Objectives...................................................................................................................................... 6 2.2 Traffic Management Objectives ................................................................................................................ 8 3. Selection of Intersection Type ............................................................................................................ 10 3.1 General ................................................................................................................................................... 10 3.2 Types of Intersections ............................................................................................................................ 10 3.2.1 Considerations .......................................................................................................................... 10 3.2.2 Basic Turn Treatments (Type BA) ............................................................................................ 13 3.2.3 Auxiliary Lane Turn Treatments (Type AU) .............................................................................. 17 3.2.4 Channelised Turn Treatments (Type CH) ................................................................................ 22 3.2.5 Intersection Treatments – Rural Divided Roads ....................................................................... 25 3.2.6 Intersection Treatments – Urban Divided Roads ..................................................................... 27 3.2.7 Staggered T-intersections ........................................................................................................ 29 3.2.8 Seagull Treatments .................................................................................................................. 33 3.2.9 Wide Median Treatments ......................................................................................................... 35 3.2.10 Channelised Intersections with Right-turn Restrictions ............................................................ 36 3.3 Intersection Selection ............................................................................................................................. 36 3.3.1 Introduction ............................................................................................................................... 36 3.3.2 Selection Process ..................................................................................................................... 38 3.3.3 Assessment of Intersection Control Options ............................................................................ 42 3.3.4 Intersection Type Selection – Key Traffic Management Considerations ................................. 48 3.3.5 Determining the Need for Auxiliary Lanes ................................................................................ 53 3.3.6