Multiphase ADS
Multiphase ADS
SRL’s Multiphase Adaptive Detection System uses advanced deep learning algorithms and a high-precision radar detector to automatically adjust green times, accurately interpreting traffic volume and speed for optimal flow management. Multiphase ADS is compatible with Rapid Response, any SRL portable signal and SolarLight™.
A new solution to traditional problems.
Multiphase ADS addresses several key challenges faced by local authorities in managing temporary traffic control at complex junctions. Traditional systems often require manual setup, are limited to two-phase operation, and struggle to adapt to fluctuating traffic volumes—leading to congestion, driver frustration, and safety risks.
Multiphase ADS was designed to solve these issues with fully automated, real-time signal control for 2, 3, and 4-way layouts, reducing reliance on manual intervention and improving traffic flow efficiency.
By optimising green times dynamically—including extended phases for slow-moving vehicles like HGVs—Multiphase ADS supports safer, smoother journeys through roadworks, helping local authorities deliver better public outcomes while reducing costs and resource demand.
Request a call backHow Does Multiphase ADS Work?
Multiphase ADS connects a high-precision radar detector, which gathers real-time data on traffic volumes and speeds at the roadside, to temporary traffic lights. This data is then analysed by a sophisticated algorithm that dynamically adjusts green times to optimise traffic flow.
The busier the road, the more valuable this unique technology becomes, including taking in factors for site-specific conditions like HGV lag.
SRL’s Multiphase ADS is particularly effective in managing tidal traffic flow, reducing congestion for vehicles moving in one direction. As peak traffic subsides, the system adapts green times to reflect quieter conditions, ensuring smooth, efficient traffic management.
Key Features
SRL Multiphase ADS achieves a remarkable 50% reduction in average queue length and a 29% decrease in maximum queue length. This leads to less congestion at busy roadworks, allowing traffic to flow more smoothly. With fewer delays, drivers benefit from a more efficient experience on the road. This enhancement not only improves travel times but also reduces frustration for motorists navigating high-traffic areas, contributing to a better overall driving environment.
The implementation of Multiphase ADS results in a significant 22% reduction in average journey times at critical junctions. By intelligently optimising green light durations, the system allows vehicles to pass through temporary traffic works more quickly, shortening their overall travel time through the junction. This efficient traffic management solution not only enhances the experience for individual drivers but also contributes to reduced congestion in the area, fostering a smoother flow of vehicles and improved accessibility for all road users.
During peak traffic hours, Multiphase ADS delivers an impressive 40% reduction in average journey times peak flows (between 08.40 and 09.00 across all routes), while routes with the highest flow of traffic experience a staggering 52% reduction in travel time. This performance is particularly beneficial for heavily trafficked corridors. By effectively managing traffic flow even during busy periods, the system ensures that drivers encounter less congestion and reach their destinations more swiftly, enhancing overall traffic efficiency and reducing emissions caused by vehicle idling at junctions.
Choose ADS. Choose Control.
What can you expect from Multiphase ADS?
- Operates on 2,3 and 4 way junctions
- Fully Adaptive/dynamic
- Recognises HGV ‘start lag’ where HGV may take longer to pull away
- Recognises cycles
- Recognises HGV’s at up to 100m and attempts to provide time for vehicle to pass.
- Recognises reverted demand (jump on red or failure to move on green)
Now Easier to Identify
As of July 2025, all Multiphase ADS signal heads feature green faceplates—a clear visual identifier of SRL’s industry-leading detection system.
Request a call backLearn more about Multiphase ADS...
SRL’s Multiphase ADS is designed for use on temporary traffic signal installations across a wide range of environments, including urban, suburban, and rural roadworks. It is particularly effective on complex junctions requiring multiple phases or traffic streams, such as crossroads, T-junctions, and staggered intersections – and has been proven to deliver the greatest benefits in busy environments – just where you need it most!
No. Multiphase ADS is an exclusive SRL innovation, engineered to work seamlessly with SRL’s portable and temporary traffic signal systems. It is not compatible with other manufacturers’ hardware. To benefit from ADS, you’ll need to use SRL’s certified equipment and controllers.
Of course there are similar technologies available in the market, but crucially, SRL’s Multiphase ADS is the only technology capable of 2, 3 and 4 way control.
Though Multiphase ADS has the intelligence to replace manual control in some instances, it is not designed to replace remote operation.
While ADS optimises traffic flow by adapting timings in real-time, remote operation (via REMOS) allows live monitoring, adjustment, and optimisation once the system is running.
One brilliant benefit of our UltraLight signals is that Multiphase ADS is autoconfigured – so there’s no set up required to get the most out of your portable traffic lights.
EuroLight & SolarLight requires configuration. More information can be found in our set-up guide.
No. Multiphase ADS is not available in our most basic, core product, RadioLight. Multiphase ADS is distinguishable by its shape and colour vs the basic detector.
It is available in EuroLight, SolarLight, REMOS & UltraLight. It is only autoconfigured in REMOS and UltraLight.
Multiphase ADS is the default mode of operation on REMOS-enabled traffic signals, and the two systems work in tandem to provide a faster, smarter signal deployment and control process. This means that when an operator is not intervening, the system is already running the most efficient timings.
Services and Support
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