Speed Limit Guideline for South Australia
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Speed Limit Guideline for South Australia Safety and Service Division TRAFFIC MANAGEMENT Publications Speed Limit Guideline for South Australia AMENDMENT RECORD Version Page Date Amendment Description Name Endorsed by DPTI’s Traffic Operations 1 15 / 8 / 2017 I Hunt and Safety Strategy This document has been prepared by Traffic Engineering Standards, Traffic Operations of the Department of Planning, Transport and Infrastructure (DPTI). It has been approved and authorised for use by Councils, DPTI and its authorised agents by: Manager, Traffic Services 15 / 8 / 2017 The content of this document has been adapted from the NSW Speed Zoning Guidelines (2011). DPTI acknowledges the valuable contribution of Transport for NSW’s Centre for Road Safety to the development of this South Australian Guideline. Extracts may be reproduced providing the subject is kept in context and the source is acknowledged. Every effort has been made to supply complete and accurate information. This document is subject to continual revision and may change. Feedback from users of this document is encouraged for consideration in the next revision. Comments can be emailed to [email protected]. For information regarding the interpretation of this document please contact: Traffic Engineering Standards, Traffic Operations, Department of Planning, Transport and Infrastructure Email: [email protected] K-Net Doc: 10375858 UNCONTROLLED COPY WHEN PRINTED Version No.: 1 Issue Date: 15/08/2017 Doc. Owner: Traffic Engineering Standards Speed Limit Guideline for South Australia Contents Section 1: Introduction Scope, approvals and definitions 1.1 General ..................................................................................................................... 1 1.2 Scope ........................................................................................................................ 1 1.3 Approvals .................................................................................................................. 1 1.4 Specifications ............................................................................................................ 2 1.5 Definitions ................................................................................................................. 2 1.6 Structure of this document ........................................................................................ 3 1.7 Reference documents ............................................................................................... 3 1.8 Further information .................................................................................................... 3 Section 2: Speed limit policy Principles and procedures 2.1 Safer speeds strategy ............................................................................................... 4 2.1.1 Functional Hierarchy ....................................................................................... 4 2.1.2 Safe System.................................................................................................... 4 2.1.3 Speed versus risk and severity of crash ......................................................... 5 2.1.4 Relationship between speed limit and mean speeds ...................................... 5 2.2 Speed limit principles ................................................................................................ 5 2.2.1 Speed limits and speed zones ........................................................................ 6 2.2.2 Route-based approach ................................................................................... 6 2.2.3 Improved road safety ...................................................................................... 7 2.2.4 Engineering measures .................................................................................... 7 2.2.5 Economic impact ............................................................................................ 7 2.2.6 Public expectations ......................................................................................... 7 2.3 Speed limits in South Australia ................................................................................. 7 2.3.1 Introduction ..................................................................................................... 8 2.3.2 Speed limits – types and ranges ..................................................................... 8 2.3.3 Speed limit length ........................................................................................... 9 2.3.4 Variable speed limits ..................................................................................... 10 2.3.5 Offset speed limits ........................................................................................ 10 2.3.6 Unsealed roads ............................................................................................. 10 2.3.7 Advisory speeds ............................................................................................ 10 2.4 Key factors in setting speed limits ........................................................................... 11 2.4.1 Introduction ................................................................................................... 11 2.4.2 Road function ................................................................................................ 11 2.4.3 Roadside development ................................................................................. 11 2.4.4 Road characteristics ..................................................................................... 11 2.4.5 Traffic characteristics .................................................................................... 12 2.4.6 At-risk locations ............................................................................................ 13 2.5 Speed limit review process ..................................................................................... 13 2.5.1 Introduction ................................................................................................... 13 2.5.2 Requests for speed limit review and approval .............................................. 13 2.5.3 Consultation .................................................................................................. 14 2.5.4 Implementation ............................................................................................. 15 Department of Planning, Transport and Infrastructure August 2017 Uncontrolled when printed ii Speed Limit Guideline for South Australia Section 3: Technical details Types and signing of speed limits 3.1 General ................................................................................................................... 16 3.1.1 Definitions of types of speed zoning ............................................................. 16 3.2 Typical Speed Limit Applications ............................................................................ 17 3.3 Other speed limits ................................................................................................... 21 3.3.1 High pedestrian activity centres .................................................................... 21 3.3.2 Speed-limited areas ...................................................................................... 22 3.3.3 Shared zones ................................................................................................ 23 3.3.4 School zones ................................................................................................ 26 3.3.5 Beaches ........................................................................................................ 27 3.4 Speed limit signing – general requirements ............................................................ 28 3.4.1 Definitions ..................................................................................................... 28 3.4.2 Regulatory signs ........................................................................................... 28 3.4.3 Non-regulatory signs ..................................................................................... 29 3.4.4 Buffers .......................................................................................................... 31 3.4.5 Installation and location of signs ................................................................... 32 3.4.6 Size and location of signs ............................................................................. 32 3.4.7 Sign sizes for approaches to built-up areas .................................................. 34 3.4.8 Repeater signs .............................................................................................. 35 3.4.9 Signing for electronic variable speed limits ................................................... 36 3.5 Other speed limits – special signing requirements ................................................. 37 3.5.1 Signing for high pedestrian activity areas ..................................................... 37 3.5.2 Signing for speed-limited areas .................................................................... 39 3.5.3 Signing for shared zones .............................................................................. 41 3.5.4 Signing for school zones ............................................................................... 42 3.5.5 Signing for speed limits on beaches ............................................................. 43 Appendix A: References Appendix A1 Government plans ..................................................................................