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QGTTM
TM at Works on Roads Guideline
QGTTM
Current
Guideline – Traffic Management at Works on Roads
Department of Transport and Main Roads · March 2025
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Official source ↗
Pages
100
Sections
215
Searchable sentences
1,474
Status
Current
Contents
Copyright
p. 2
Licence
p. 2
CC BY licence summary statement
p. 2
Translating and interpreting assistance
p. 2
Disclaimer
p. 2
Feedback
p. 2
About this document
p. 3
How to use this document
p. 3
Definitions
p. 3
Chapter 1
Signs and devices
p. 9
1
Use of supplementary devices at roadworks to reduce speed
p. 9
1.1
Purpose
p. 9
1.2
Background
p. 9
1.3
Speed indicator devices
p. 9
1.3.1
General
p. 9
1.3.2
Technical requirements
p. 10
1.3.3
Speed display
p. 10
1.3.4
Site installation
p. 10
1.3.5
Data collection
p. 11
1.4
Rumble strips / rumble mats
p. 11
1.4.1
General
p. 11
1.4.2
Installation
p. 11
1.4.3
Technical requirements
p. 11
1.4.4
Signage requirements
p. 12
1.4.5
Removal from site
p. 12
1.5
UHF radio broadcast
p. 12
1.5.1
General
p. 12
1.5.2
Technical requirements
p. 12
1.5.3
Clearance from traffic lanes
p. 13
1.6
Temporary speed humps
p. 13
1.6.1
General
p. 13
1.6.2
Application of a speed hump device
p. 13
1.6.3
Number of temporary speed humps at a work site
p. 13
1.6.4
Speed hump warning signs
p. 14
1.6.5
Speed hump installation requirements
p. 14
1.6.6
Delineation
p. 14
1.6.7
Approved profiles
p. 14
1.7
Variable message sign with automatic number plate recognition speed indicator device
p. 14
1.7.1
General
p. 14
1.7.1
VMS / ANPR speed indicator devices
p. 15
1.7.2
Technical requirements
p. 15
1.7.3
Variable message sign size
p. 16
1.7.4
Variable message sign message display
p. 16
1.7.5
Site installation
p. 17
1.7.6
Data collection
p. 17
2
End-of-queue risk control measures
p. 18
2.1
Managing speed on approach to the traffic queue
p. 18
2.2
Use of enhanced queued traffic warning signs (TM1-46-Q01)
p. 18
2.3
Use of an additional Traffic Controller
p. 20
2.4
Signs to encourage the use of hazard lights by last vehicle in queue
p. 20
3
Anti-gawking screens
p. 21
3.1
Background
p. 21
3.2
Considerations
p. 22
3.2.1
General
p. 22
3.2.2
Specific requirements
p. 22
3.2.3
Stability
p. 22
3.2.4
Delineation
p. 23
3.2.5
Installation and maintenance
p. 23
Chapter 2
Traffic management guidelines
p. 24
1
Use of temporary variable speed limit signs in construction and maintenance work areas on motorways
p. 24
1.1
Display
p. 24
1.2
Placement
p. 25
1.3
Planning and operations
p. 25
1.4
Faults management
p. 25
2
Use of permanent variable speed limit and lane control signs in construction and maintenance work areas on motorways
p. 25
2.1
Definitions
p. 26
2.2
Background
p. 27
2.3
Principles for using VSL / LCS during construction / maintenance
p. 28
2.3.1
General
p. 28
2.3.2
Speed management
p. 29
Principle 1: Normal traffic control devices are required
p. 29
Principle 2: One static speed limit is required at the work site
p. 29
Principle 3: Variable speed limit signs within the work area
p. 29
Principle 4: Speed limit signs just prior to the work site
p. 29
Principle 5
Buffer speed limits
p. 30
Principle 6
Static speed limit sign at the end of the work site
p. 30
Principle 7
Entrance ramps
p. 30
Principle 8
Side mounted variable speed limit sign
p. 30
2.3.3
Lane control
p. 30
Principle 9
Lane closure on VSL / LCS
p. 30
Principle 10
Flashing red crosses and red crosses
p. 30
Principle 11
White arrows
p. 30
Principle 12
Speed limits in conjunction with lane control
p. 30
Principle 13
Closure of a central lane
p. 31
Principle 14
Low flow conditions
p. 31
2.3.4
Other
p. 31
Principle 15
Variable message signs
p. 31
2.4
Planning
p. 31
2.4.1
Preparation of Traffic Management Plans
p. 34
2.4.2
Review of Traffic Management Plan by the Traffic Management Centre
p. 34
2.4.3
Operation
p. 35
Before starting the work
p. 35
Staged implementation of the VSL / LC plan* (speed reduction and lane control)
p. 36
During the work
p. 36
At the end of the work
p. 36
2.5
Planned events (other than roadworks)
p. 36
2.6
Example figures for VSL / LC signs used for roadworks
p. 37
3
Traffic operations level of service for roadworks sites
p. 54
3.1
Purpose
p. 54
3.2
Background
p. 54
3.3
Discussion
p. 54
Chapter 3
Risk management
p. 56
1
Risk management and exception process for traffic control at road work sites
p. 56
1.1
Background
p. 56
1.2
Risk management
p. 57
Use of standard and site-specific Traffic Management Plans
p. 57
Roles and responsibilities
p. 57
1.3
Exceptions process
p. 57
1.3.1
General
p. 57
1.3.2
Development and evaluation of alternatives
p. 58
1.3.3
Mitigation
p. 58
1.3.4
Documentation
p. 60
Chapter 3
Risk management
p. 61
What is the proposed departure?
p. 61
What alternatives have been considered?
p. 61
What are the costs and impacts of the standard arrangement and Exception (including environmental, community, network and safety impacts along with any other relevant factors and constraints)?
p. 61
What mitigation treatments were identified in the risk assessment in relation to this Exception?
p. 61
What is the safety performance of the standard arrangement?
p. 61
What is the expected safety performance of the arrangement that incorporates the Exception (including performance information from other sites where the Exception has been applied)?
p. 61
Is the difference acceptable?
p. 61
1.4
Roles and responsibilities
p. 62
1.5
Monitoring and evaluation
p. 62
Chapter 4
Application and use of truck and trailer mounted attenuators (TMAs) at roadworks
p. 63
1
Objectives
p. 63
2
Terminology
p. 63
3
Reference and applicable documents
p. 64
4
Risk management
p. 64
5
Technical specifications
p. 65
5.1
Host vehicle
p. 66
5.2
Impact attenuator unit testing requirements
p. 68
5.3
Impact attenuator unit test level ratings
p. 68
5.4
Truck mounted impact attenuator unit
p. 68
5.4.1
Truck mounted impact attenuator unit configuration
p. 68
5.5
Trailer mounted impact attenuator unit
p. 69
5.6
Truck mounted attenuator repairs, modifications and inspections
p. 69
5.7
Traffic control devices
p. 69
5.7.1
Vehicle mounted signs and devices
p. 69
5.7.2
Advance warning vehicles
p. 70
6
Qualification criteria for operators
p. 70
6.1
Truck mounted attenuator operator training – gained qualifications and experience through competency-based assessment
p. 70
6.1.1
Plan and prepare
p. 70
6.1.2
Conduct truck and attenuator pre-operational checks
p. 70
6.1.3
Check truck mounted attenuator devices and identify positioning of truck mounted attenuator
p. 70
6.1.4
Use radio communication
p. 71
6.1.5
Operate truck mounted attenuator
p. 71
6.1.6
Carry out operator maintenance
p. 71
7
Operational procedures
p. 71
7.1
Operational requirements
p. 71
7.2
Use of truck mounted attenuators
p. 72
7.3
Truck mounted attenuator work instructions
p. 72
Appendix A
15-tonne gross vehicle mass rationale
p. 73
15-tonne gross vehicle mass (GVM) requirement for truck mounted attenuator host vehicle
p. 73
Minimum tare mass
p. 73
Weight distribution
p. 73
Use of ballasting
p. 73
Chassis size and strength for impact attenuator unit mounting
p. 73
Conclusion
p. 73
Appendix B
Rearward seat collapse
p. 74
Prevention of rearward seat collapse
p. 74
Background
p. 74
Rearward seat collapse
p. 74
Appendix C
Traffic Guidance Schemes
p. 75
Chapter 5
Methods for controlling traffic and lookout persons
p. 76
1
Manual traffic control with a STOP / SLOW bat
p. 76
1.1
Controlling traffic with STOP / SLOW bat
p. 76
1.2
Signals or boom barrier failure or malfunction
p. 76
2
Portable traffic control device (PTCD)
p. 76
2.1
General
p. 76
2.2
Application
p. 77
2.3
Location
p. 77
2.4
Boom barrier
p. 78
2.5
Portable traffic signals
p. 79
2.5.1
Introduction
p. 79
2.5.2
Definitions
p. 79
2.5.3
Types of portable traffic signal systems
p. 81
2.5.3.1
General
p. 81
2.5.3.2
Type-1 portable traffic signal systems
p. 81
2.5.3.3
Type-2 portable traffic signal systems
p. 82
2.5.4
Application guideline
p. 83
2.5.5
Control types
p. 83
2.5.5.1
Shuttle control
p. 83
2.5.5.2
Plant crossing control
p. 84
2.5.5.3
Gating control
p. 85
2.5.6
Modes of operation
p. 86
2.5.6.1
Flashing yellow operation
p. 86
2.5.6.2
Manual operation
p. 86
2.5.6.3
Vehicle actuated operation
p. 86
2.5.6.4
Fixed-time operation
p. 86
2.6
Equipment installation
p. 87
2.6.1
Safety considerations
p. 87
2.6.2
Lanterns
p. 87
2.7
Time settings
p. 87
2.7.1
General
p. 87
2.7.2
Yellow time
p. 88
2.7.3
All-red time
p. 88
2.7.4
Maximum green time
p. 89
2.8
Operation
p. 91
2.8.1
Monitoring portable traffic signal systems
p. 91
2.8.2
Trouble shooting vehicle actuated operation
p. 92
2.8.3
Adjusting green time for fixed-time operation
p. 92
3
Lookout protection method
p. 92
3.1
Introduction
p. 92
3.2
Using lookouts at night
p. 93
3.3
Minimum warning time
p. 94
3.4
Minimum sight distance
p. 94
3.5
Lookout responsibilities
p. 95
3.6
References and further information
p. 96
Chapter 6
Traffic management administration
p. 97
1
Video record keeping of traffic management at roadworks
p. 97
1.1
General
p. 97
1.2
Purposes for which video records may be required
p. 97
1.3
Application of this guidance
p. 97
1.3.1
Video camera specification
p. 98
1.3.2
Video recording practice
p. 98
1.3.3
Record keeping
p. 99
