AS 1742.3 and Temporary Traffic Management: What Roadworks Signage Standards Actually Require

Key Takeaways

• AS 1742.3:2019 covers traffic control devices used for works on roads and other affected transport environments, including relevant pedestrian and cycling facilities
• Temporary traffic management documentation may include a Traffic Management Plan (TMP), Traffic Guidance Scheme (TGS), or other documents required by the relevant road authority
• Detailed planning and implementation guidance is provided through the Austroads Guide to Temporary Traffic Management (AGTTM)
• State and territory road authorities may apply supplements or additional requirements that modify how the national framework is applied locally
• Traffic controller clothing requirements are addressed through AGTTM guidance and AS/NZS 4602.1 rather than AS 1742.3 alone

AS 1742.3 temporary traffic management sets the framework for how roadworks signage, barriers and other traffic control devices are used to keep road users and workers safe around temporary worksites. The current standard, AS 1742.3:2019, works alongside the Austroads Guide to Temporary Traffic Management (AGTTM) and relevant state or territory requirements, rather than covering every aspect of temporary traffic management on its own.

For businesses planning or managing roadworks, understanding how these documents fit together is essential. Reflective Fabrications works across reflective traffic signage and high-visibility workwear, giving us practical insight into the signage, traffic control devices and visibility requirements that support safer temporary worksites.

What Is AS 1742.3?

AS 1742.3 is Part 3 of the Manual of Uniform Traffic Control Devices, the Standards Australia series that governs how signs, signals, and markings are used on Australian roads. Where AS 1742.1 sets out general principles and AS 1742.2 covers permanent traffic signs, Part 3 deals specifically with temporary traffic control: the signs, barriers, and devices used to manage a worksite for the duration of the works, then removed once the job is done.

The current edition is AS 1742.3:2019, published in December 2019. It sets out the traffic control measures and devices used to warn, instruct, and guide road users safely past work sites, and this scope extends beyond sealed roads to unsealed roads, footpaths, shared paths, and bicycle paths adjacent to the roadway. It applies to roadworks and bridgework, utility and service works, and effectively any activity that interferes with or obstructs the normal use of a road.

AS 1742.3:2019 vs the 2009 Edition: Why the Guide to Temporary Traffic Management Exists

If you’ve worked with older traffic management documentation, you may have seen references to AS 1742.3-2009. That edition is now superseded. The 2019 update did more than refresh the standard. It also restructured where the guidance sits.

What Changed in 2019?

Under the 2009 edition, the standard combined:

• Core regulatory requirements
• Worked examples
• Planning advice
• Practical implementation guidance

When Standards Australia revised the standard in 2019, much of that practical guidance was moved out of AS 1742.3 itself and into a new companion resource developed by Austroads: the Guide to Temporary Traffic Management (AGTTM).

AS 1742.3 and the AGTTM Have Different Roles

The result is a leaner standard focused on core requirements, paired with a guide that provides the detailed planning and implementation advice.

The AGTTM is a 10-part suite covering areas including:

• Traffic management planning
• Static worksites
• Mobile works
• Traffic controllers
• Sample layouts and implementation guidance

Austroads has continued to update individual parts since the suite was first released in December 2019. If you’re relying on a particular part, check that you are using its current edition, rather than assuming the entire suite was updated at the same time.

In practical terms: AS 1742.3:2019 sets out the core requirements, while the AGTTM provides the detailed guidance for planning and delivering temporary traffic management.

Traffic Management Plan vs Traffic Guidance Scheme

Two terms that are often used interchangeably in casual conversation, but under the standard they refer to different documents. Understanding the distinction is important when planning and approving temporary traffic management.

Traffic Management Plan (TMP)

A Traffic Management Plan (TMP) is the overall document that explains how a worksite will be managed safely.

It covers:

• The nature and scope of the works
• How traffic, pedestrians and workers will be kept safe
• How traffic management arrangements will be implemented
• How those arrangements will be monitored and reviewed

Think of the TMP as the overall management plan for the worksite.

Traffic Guidance Scheme (TGS)

A Traffic Guidance Scheme (TGS) is more specific. It sets out the actual arrangement of signs, devices and traffic control measures for a particular site or stage of works.

In practical terms, it is the layout showing what goes where.

Some jurisdictions and contractors also use the term ‘Traffic Control Plan’ (TCP) to describe something similar to a TGS. Terminology can therefore vary between councils, contractors and states.

TMP vs TGS at a Glance

Who Prepares Them?

Under AS 1742.3:2019, both the TMP and TGS are prepared by a competent person with the appropriate training, knowledge and experience to develop the required traffic management arrangements.

For works beyond short-term, low-impact activities, the relevant road authority may require both documents as part of the approval process. The exact requirements can vary depending on the jurisdiction, type of work, and site conditions.

In simple terms: the TMP explains how the worksite will be managed, while the TGS shows how the traffic control arrangement will look on the ground.

What a Compliant Worksite Actually Needs

A temporary traffic management setup may require a combination of signs, traffic control devices and other measures, depending on the worksite. Typical measures include:

• Advance warning signage to give road users sufficient notice of the worksite and any changes ahead
• Speed control measures, where required, such as a temporary speed restriction
• Worksite approach and departure signage to communicate the nature of the works and changes to the normal traffic conditions
• Detour signage where traffic or pedestrians need to follow an alternative route
• Traffic control devices to regulate movement through the worksite, which may include traffic controllers, temporary traffic signals, sign-controlled single-lane operation or boom barriers.

Why the Setup Varies

There is no single traffic management arrangement that applies to every worksite. The appropriate combination of signs and devices depends on factors such as:

• The nature and duration of the works
• The road classification
• Traffic volume and speed
• Pedestrian and cyclist movements
• The location and surrounding environment
• The specific risks created by the works

This is why temporary traffic management needs to be planned for the conditions of the individual site rather than relying on a generic layout. The AGTTM provides separate guidance for different worksite situations, including static works, mobile works and short-term low-impact works.

Traffic Controller Clothing Requirements

This is where temporary traffic management connects directly to what people on the worksite are wearing. The connection is easy to miss because AS 1742.3 does not directly set out traffic controller clothing requirements.

Traffic controller practice, including clothing requirements, is covered in Part 7 of the Austroads Guide to Temporary Traffic Management (AGTTM). Its “What to wear” section points to AS/NZS 4602.1, the Australian Standard covering high-visibility safety garments.

In practice, this means a traffic controller holding a stop-slow sign needs a garment that meets the applicable AS/NZS 4602.1 requirements and is correctly classified for the conditions in which they are working, including day, night, or both.

Why Garment Classification Matters

Getting the ensemble classification right is just as important as selecting an individual-compliant garment. The required classification depends on the conditions in which the traffic controller is working, including the available light and whether the work is conducted during the day or at night.

Mixing and matching garment pieces without considering the requirements for the complete ensemble can create compliance issues, even when each individual garment appears suitable on its own.

RF’s guide to AS/NZS 4602.1:2024 ensemble classification explains how these classifications work and what to consider when selecting high-visibility workwear for different working conditions.

Where Signage and Clothing Meet

Traffic management relies on more than the signs and devices placed on the road. The people implementing those controls also need to remain clearly visible to approaching road users.

As a manufacturer of both reflective traffic signage and AS/NZS 4602.1-compliant high-visibility workwear, Reflective Fabrications supports both sides of that visibility chain: the devices used to guide traffic and the clothing worn by the people managing it.

Before Your Worksite Goes Live: A Practical Checklist

• Traffic Management Plan and, where required, Traffic Guidance Scheme prepared by a competent person
• Approvals obtained from the relevant road authority before works commence
• Current state or territory supplement checked and incorporated, not just the national standard
• Signage and devices on site match what’s shown on the approved scheme
• Traffic controllers equipped with AS/NZS 4602.1-compliant clothing, correctly classified for day, night, or both
• An approved copy of the traffic guidance scheme kept on site at all times

Getting Temporary Traffic Management Right

Effective temporary traffic management is about more than placing signs around a worksite. AS 1742.3, the AGTTM and relevant state requirements work together to guide how traffic, pedestrians and workers are managed safely. Before work begins, make sure your traffic arrangements, signage, devices and high-visibility clothing are appropriate for the site and meet applicable requirements.

If you’re sourcing reflective roadworks signage or high-visibility workwear, make sure the products you select are appropriate for your traffic management requirements and the conditions of the worksite.

Reflective Fabrications manufactures reflective signage and compliant high-visibility garments for organisations that need reliable visibility solutions. Talk to Reflective Fabrications about visibility solutions for your temporary worksite.