AS 1742.4-2008

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Manual of uniform traffic control devices, Part 4: Speed controls

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Specifies the traffic control devices to be used for the regulatory control of traffic speed and gives guidance on how speed limits should be determined and applied in various situations. The Standard does not cover temporary speed limits, the use of advisory speed signs, or speed limits applicable to certain classes of vehicle or driver.

Header

About this publication

Preface

Foreword

1 Scope and general

1.1 Scope

1.2 Objective

1.3 Referenced documents

1.4 Definitions

2 Speed management

2.1 General

2.1.1 Objective of speed management

2.1.2 General principles

2.2 Types of speed limit

2.2.1 Default speed limits

2.2.2 Speed zones

2.3 Speed zone establishment

2.3.1 General

2.3.2 Primary determination of speed limit

2.3.3 Permitted adjustments to speed limits

2.3.4 Length of a linear speed zone

2.3.5 Speed limit buffers

2.3.6 Offset speed zones

3 Speed limit signs and markings

3.1 Speed limit signs

3.1.1 General

3.1.2 Signs for linear speed zones and default speed limits

3.1.3 Signs for area speed zones

3.1.4 Signs for school zones

3.1.5 Signs for shared zones

3.1.6 Signs for bridges and service roads

3.2 Sign application

3.2.1 General

3.2.2 Default urban and default rural speed limits

3.2.3 Linear speed zones

3.2.4 Area speed zones

3.2.5 School zones

3.2.6 Shared zones

3.2.7 Repeater signs

3.2.8 Sign size

3.3 Conflict with advisory speed signs

3.4 Pavement markings

3.5 Variable speed limits

Appendix A

A1 Scope

A2 Roadside development

A3 Road characteristics

A3.1 Alignment

A3.2 Road access

A3.3 Intersections

A3.4 Road hazards

A4 Traffic characteristics

A4.1 Traffic pattern

A4.2 Pedestrians

Appendix B

B1 Scope

B2 General

B3 Means of illumination

B4 Means of reflectorization

Appendix C

C1 Scope

C2 Uniformity of location

C2.1 General

C2.2 Longitudinal placement

C2.3 Lateral placement and height

C2.3.1 General

C2.3.2 Lateral placement—rural

C2.3.3 Lateral placement—urban

C2.3.4 Height—rural

C2.3.5 Height—urban

C2.3.6 Overhead mounting

C3 Sign orientation