How VMS boards improve traffic flow around worksites

I&D Traffic Management • September 2, 2026

Clear communication is one of the most important parts of temporary traffic management. When road conditions change because of works, events or detours, drivers need enough warning to understand what is happening and how they should respond. Variable message signs, commonly called VMS boards, are one way project teams can communicate that information before motorists reach the affected area.

VMS boards are useful because they can be positioned where drivers have time to read and respond to a message. They are often used alongside traffic controllers, temporary road signs and other traffic management equipment as part of a broader site setup.

What is a VMS board?

A VMS board is a portable electronic sign designed to display temporary traffic messages. Depending on the project, it may be used to communicate roadworks, changed traffic conditions, detours, speed information or public notices.

I&D Traffic Management provides VMS board hire for roadworks, construction projects, events and other traffic control requirements across South Australia and Victoria.

Giving drivers earlier notice

One of the main benefits of a VMS board is the ability to communicate with motorists before they reach a work zone. Earlier notice can give drivers more time to slow down, change lanes, follow a detour or prepare for temporary traffic controls.

This can be especially useful on higher-speed roads or where traffic conditions are changing over a longer distance. The sign becomes part of the wider traffic management setup, helping reinforce what drivers will encounter ahead.

Supporting detours and changed access

Roadworks and events can temporarily change normal routes. VMS boards can be used to advise motorists of detours, closures or changed access points before they reach the affected intersection or work area.

For projects involving multiple traffic changes, the messaging should align with the traffic management plan so road users receive consistent information across signs, controllers and other traffic control devices.

Helping manage traffic around events

Events can create short-term increases in vehicle and pedestrian activity, particularly around access points, parking areas and nearby roads. VMS boards can help provide advance notice of closures, detours or changed traffic arrangements.

They can be used as part of broader event traffic management to support clearer movement around the event area before, during and after activities.

Working alongside other traffic control equipment

VMS boards are generally most effective when used with other traffic management measures. Temporary road signs provide detailed directions closer to the work zone, traffic controllers manage live vehicle movements and portable traffic lights can help control alternating traffic where lanes are restricted.

Explore our traffic equipment hire options, including road signage, mobile traffic lights and vehicle-mounted warning devices.

Choosing the right location for the sign

A VMS board needs to be positioned where motorists can see the message with enough time to respond. The best location will depend on road speed, sight distance, intersections, surrounding signage and the nature of the traffic change.

Placement should be considered as part of the traffic planning process rather than decided in isolation. That helps ensure the message supports the overall traffic arrangement instead of creating confusion or competing with other instructions.

Use VMS boards as part of a coordinated traffic setup

VMS boards can be a useful communication tool for roadworks, construction, events and temporary traffic changes. Their value comes from providing timely information that works together with traffic plans, controllers and other site equipment.

Explore our VMS board hire options for projects across South Australia and Victoria.

Contact our team to discuss your traffic management setup and the equipment your project may require.

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