Elevated Work Platforms and Overhead Works on Roads

EWP road traffic control has to protect three zones at once: the vehicle and its outriggers on the ground, the full envelope the boom and basket can reach, and the drop zone below. A closure sized to the truck alone is not enough. Plan lane space for the full slew, check powerlines and passing high vehicles, and keep pedestrians clear underneath.

Streetlight maintenance, traffic signal repairs, sign installation, tree trimming and utility work all put people in a basket above a road. The machine is usually well maintained and the operator well trained. Incidents tend to come from the interface: a bus clipping an outstretched boom, a dropped tool hitting a pedestrian, an outrigger sinking into a soft verge, or a boom drifting towards a power line while everyone watched the traffic. This guide covers how to plan for those interfaces.

This is general information, not safety or engineering advice. Follow the manufacturer's instructions, the approved traffic guidance scheme (TGS) and your state regulator's requirements.

The three zones of an EWP on a road

The working envelope is the zone most often missed. A truck-mounted EWP standing in the kerb lane can easily reach over the adjacent lane when the operator slews to the next fitting. Buses and trucks are tall; general access heavy vehicles can be up to 4.3 metres high, and some approved vehicles are higher. A boom or basket over a live lane at that height is in the path of traffic.

Licences, roles and competency

Several qualifications are involved, and they are not interchangeable.

• EWP operator. A high risk work licence is required to operate a boom-type EWP with a boom length of 11 metres or more. For other types of EWP, the business must make sure operators have the training, information and instruction to use them safely. Safe Work Australia explains the model law requirements; check your state regulator for the local rules.
• Driver. A truck-mounted EWP needs the correct driver licence class for the vehicle.
• Traffic control. Traffic controllers need the traffic control training required in that state. In NSW, SafeWork NSW issues Traffic Control Work Training cards, and an employer must not direct a worker to do traffic control work without the right card.
• Safety observer or spotter. Near overhead lines, a trained safety observer may be required to watch the boom and warn the operator.
• Ground support. Someone on the ground must be able to operate the ground controls in an emergency.

Construction work using an EWP is likely to be high risk construction work, and work on or next to a road used by traffic is high risk construction work, so a SWMS is required. Our guide to SWMS for traffic control covers what the traffic part should include.

Powerlines and other overhead hazards

Electric lines are the overhead hazard with the worst consequences. Approach distances depend on voltage, the type of work and the state's rules, and they must account for sag and swing of the lines, movement of the plant and wind. If the voltage or clearance is unknown, or the work might come within the approach distance, contact the electricity network operator before work starts.

In NSW, SafeWork NSW's code of practice for work near overhead and underground electric lines commenced on 22 May 2026, replacing the 2006 code on overhead power lines. Check the current code and any network operator requirements rather than relying on an older table of distances.

Other overhead hazards to check during the site inspection:

• tree branches that can spring back when cut;
• traffic signal mast arms, street signs and gantries;
• shop awnings, verandahs and building facades;
• bridges and overpasses; and
• overhead telecommunications cables and lighting catenaries.

Sizing the closure for overhead works

Start from the working envelope, not the truck. Ask:

1. How far will the boom reach for this task? Map it for each work position, including the slew between fittings.
2. Will it reach over an adjacent lane? If yes, close that lane, restrict the slew so it cannot, or hold traffic during the movement under an approved arrangement.
3. What is below? Footpath, cycleway, bus stop or shop entrance. The drop zone needs its own exclusion, often a footpath closure or diversion. See our guide to pedestrian management at work sites.
4. What buffer does the TGS require? Add it to the envelope, not to the truck.
5. Is the ground suitable? Kerbs, gutters, pit lids, soft verges and slopes all affect outrigger placement.

Our guide to lane closure traffic plans covers tapers, buffers and sign spacing once the work area is known. The cone and delineator counter helps estimate devices once the closure length is set.

Intersections and signals

Work on traffic signal lanterns and mast arms often happens in the middle of an intersection. That needs coordination with the signal operator, careful phasing of closures and sometimes manual control. Our guide to signalised intersection roadworks covers the coordination.

Common overhead jobs and their traffic issues

Tree work has its own hazards around falling material; see our guide to tree lopping traffic control.

Wind, weather and night work

Manufacturers set wind limits for EWPs, and the operator should stop work when they are reached. Gusts between buildings and on bridges can be stronger than the forecast suggests. Rain makes the basket floor and ground controls slippery, and wet ground affects outrigger stability.

At night, the basket and boom must be visible to drivers, and work lights must not dazzle approaching traffic. Night overhead work also adds fatigue for crews who work repeated short shifts. Plan rosters accordingly.

Rescue and emergencies

Before anyone goes up, the team needs a rescue plan:

• Who can operate the ground controls to bring the basket down?
• What happens if the machine fails with someone in the basket?
• How will emergency services reach the site through the closure?
• What does the traffic crew do if a vehicle strikes the EWP?

If a vehicle strikes the boom, basket or truck, the traffic crew's job is to stop traffic, protect the scene and get help in. A notifiable incident must be reported to the regulator and the site preserved, except to help people or make the site safe.

Moving between work positions

Streetlight and signal crews often move the EWP many times a shift. Each move is a mini pack-down and set-up: the basket comes down and is stowed, outriggers come up, the truck travels, and the closure moves with it. The common shortcut is to travel a short distance with the boom partly raised or the basket occupied, or to shift the truck without moving the closure first. Both put the boom or the truck outside the protected area.

Agree the sequence at the pre-start: stow, move the downstream devices, travel, set up the new closure, then deploy outriggers and raise the boom. If the run includes many short stops, ask whether a mobile works arrangement suits the task, and whether a protection vehicle is needed on higher-speed roads.

Common EWP traffic control mistakes

• Closing the lane the truck occupies but leaving the slew free over the next lane.
• Using the traffic controller as the EWP spotter.
• Leaving the footpath open beneath the basket.
• Setting outriggers on pit lids, kerb edges or soft verges.
• Relying on an old table of electrical approach distances.

EWP traffic control checklist

Next steps

Plan each overhead job from the working envelope outwards, and confirm the current electrical and EWP requirements with your state regulator, such as WorkSafe Queensland or SafeWork NSW. If you supply traffic crews for overhead works, TrafWise keeps SWMS sign-off, licence checks and site records together for each shift.