Portable Traffic Light Hire: What It Costs and Who Can Run Them

Portable traffic light hire is usually priced as a daily or weekly rate per set of signals, plus delivery, set-up by a trained crew, inspections and after-hours call-outs. The lights must be an accepted device, run to an approved plan and installed by people trained for it. They often beat stop/slow on long single-lane closures, but rarely on short jobs.

This guide is for builders, civil contractors, councils and utilities weighing up portable traffic signals for a single-lane closure. It explains what you pay for, who can run them, how to compare lights with stop/slow on cost, and walks through a worked five-day bridge repair example.

What portable traffic lights are (and are not)

Portable traffic signals are trailer- or stand-mounted signal heads that alternate traffic through a single lane, usually one set at each end of the work area. They replace the controllers who would otherwise stand at each end with stop/slow bats. Our guide to portable traffic lights covers how they are used.

They are not the only alternative to a person holding a bat. Some states also recognise remotely operated portable traffic control devices, where a trained controller operates a stop/slow device from a safer position. That is a different category from portable signals, with its own rules. Do not assume one can substitute for the other.

Who can set up and run portable traffic lights

Portable signals are not a hire-and-forget item. Before they go on a public road, several people have a role.

Requirements differ between states, including which devices are accepted and the training people need. Confirm with your road authority, such as Transport for NSW or Transport and Main Roads in Queensland, and ask the supplier what their crew is trained and authorised to do. This article is general information, not engineering advice.

What drives the cost of portable traffic light hire

Ask suppliers to price each of these separately.

• Hire period. Daily, weekly or monthly rates. Longer hires usually cost less per day, but there may be a minimum hire period.
• Number of sets. A simple shuttle uses two signals. A side road inside the controlled section may need a third signal or other control.
• Delivery and collection. Trailers have to be towed to site and back.
• Set-up and pack-down crew. Signs, cones and signals installed by trained people, usually charged at controller rates with minimums.
• Timing set-up. Phasing and timing for the site, and changes if conditions change.
• Inspections. Start and end of shift checks and intervals during it, and any after-hours checks the plan requires.
• Power. Battery, solar or both. Ask how long the units run and who swaps batteries.
• Monitoring and call-outs. Remote fault alerts if offered, plus after-hours call-out charges.
• Signs and devices. Advance warning signs, stop lines and delineation are often a separate line.
• Damage and theft. Who pays if a unit is hit or stolen.

Our guide to traffic control equipment hire covers dry hire versus hire with a crew in more detail.

Lights or stop/slow? A quick decision table

The plan author decides the method for the site. But on cost alone, this is how the comparison usually falls out.

To understand the queue side of the decision, our guide to stop/slow cycle time calculation explains how cycle length affects queues, and the free TrafWise stop/slow calculator runs the numbers.

Worked example: five-day bridge repair on a rural road

Here is how a portable signal hire plays out on a typical job. This is an example scenario with made-up figures to show the process and arithmetic.

The site. A contractor needs to repair one side of a two-lane rural bridge. One lane must stay closed for five days and four nights, because the deck cannot be reopened overnight. Traffic is light to moderate, with a farm driveway just inside one end of the closure.

Step 1: the method. The plan author compares stop/slow and portable signals. Stop/slow would need two controllers on the road 24 hours a day. The plan author specifies portable signals, with the farm driveway addressed in the design.

Step 2: the cost comparison (made-up figures). Using a made-up rate of $90 per controller hour purely to show the arithmetic, stop/slow around the clock is 2 controllers × 24 hours × 5 days = 240 controller hours, or 240 × $90 = $21,600, before team leaders, night penalty rates and relief. The contractor compares that with the supplier's quote for signal hire, delivery, set-up crew, inspections and on-call response. On a closure of this length the signals usually come out well ahead, but the contractor checks the real quotes.

Step 3: the driveway. The first draft did not address the farm driveway between the signals. A vehicle leaving it could meet oncoming traffic in the single lane. The plan author revises the TGS so driveway users are controlled, and the contractor confirms the arrangement with the property owner. This is the most common design gap with portable signals.

Step 4: set-up and briefing. The crew installs the advance signs first, then the signals, stop lines and delineation, in the order the plan shows. The timing set by the competent person is entered and checked by driving through from both directions. The team leader records the start-of-shift inspection.

Step 5: what goes wrong. On night two, the supplier's remote alert shows low battery on the northern signal. The on-call technician attends, swaps the battery and records the call-out. If the unit had failed completely, the fault response in the plan required manual control until it was fixed.

Step 6: what gets recorded. Each inspection, timing checks, the battery call-out, any complaints from road users, the daily docket for the set-up and inspection crew, and the final pack-down inspection when the lane reopens.

Running portable signals day to day

Once the signals are working, the job is not finished. A well-run signal site has a routine.

Each shift. The inspector drives through from both directions and checks that both signals show the right colours in sequence, the stop lines and advance signs are visible and undamaged, and nothing has moved. Any permanent signs the plan requires to be covered are still covered. The result is recorded.

Timing checks. The inspector watches several full cycles. If the queue at either end regularly reaches the advance warning signs, or slow vehicles such as tractors, trucks or cyclists are still in the single lane when the other end goes green, the inspector reports it. Timing changes are made by the competent person, not by whoever has the key to the controller box.

Pedestrians and cyclists. If people walk or cycle through the site, the plan should show how they are managed. Watch for cyclists who struggle to clear the section in the green time.

Complaints. Residents and regular drivers will tell you if the wait feels long. Record complaints and pass them to the team leader, who decides whether a timing review is needed.

Security. Trailers left on the roadside overnight can be tampered with. Lock controller boxes and record any interference.

Pack-down. When the lane reopens, the signals are switched off and removed with the signs, in the order the plan and procedure set, permanent signs are uncovered and the final inspection confirms the road is back to normal.

Hire checklist for portable traffic lights

Common mistakes with portable signal hire

• Hiring before the plan is done. The plan decides how many signals and where they go.
• Forgetting side roads and driveways. These are the most frequent reason a design is revised.
• No fault plan. Know who attends at 2:00 am and what happens in the meantime.
• Leaving out set-up crew costs. Signals do not install themselves.
• Ignoring queue lengths. A long cycle on a busy road can push queues back past the advance signs. See our guide to lane closure queue length.

For national guidance on temporary traffic management, see Austroads.

Next steps

Get a plan that specifies the method, then ask two or three suppliers to answer every line of the hire checklist. If the closure runs around the clock, compare the full signal hire against stop/slow controller hours for the same period before you decide.