Modelling suggests SRL solution halves queues

The UK and Republic of Ireland’s only multiphase adaptive detection system for portable and temporary traffic signals has been independently proven to reduce average queue lengths by 50%, which it says potentially saves commuters more than a day a year journey time.

Created by SRL Traffic Systems, Multiphase ADS was independently modelled by Ian Routledge Consultancy.  SRL says it is the only portable and temporary solution to have been independently modelled.

Completed in May and using traffic flow data and Vissim with three-way control in a heavily saturated tidal flow location in Yorkshire, the modelling demonstrated that the impact of replacing a basic logic traffic light system with Multphase ADS was: a reduction in average queue length of 50%;  reduction in maximum queue length of 29%;  reduction in average journey time at the junction of 22% (increasing to 40% during peak flow); reduction in journey time for the route with the highest flow of traffic of 52%.

SRL estimates that there are over 20,000 portable and temporary traffic signals in use at more than 5,000 roadwork sites across the country, and as such, its solution is capable of saving commuters more than seven minutes a day, over two hours every month and more than a day a year, getting to and from work.

Launched at the end of 2020, Multiphase ADS traffic light detection technology may be used in conjunction with SRL’s Eurolight Master temporary and portable traffic lights and is the only portable and temporary ADS solution to offer two, three and four-way control.

Especially effective in areas of tidal traffic flow because of its ability to reduce the build-up of traffic moving in a single direction, Multiphase ADS works by connecting a high accuracy radar detector (which collects data about real time traffic volumes and speeds) to portable and temporary traffic lights, using an algorithm that adjusts green time accordingly, taking into account the accommodation of HGV start lag. 

Said SRL Traffic Systems’ chief operating officer, Adrian Murphy: “According to government figures, traffic is set to increase by over 55% by 2040, with an 85% hike in congestion.  With that, there will of course be an increased threat to our health from associated air pollution.

“The demand for smart technologies capable of cutting congestion has never been greater, and we are proud to be able to offer a multiphase solution with the proven capability of slashing queue lengths and waiting times, improving road users’ experience of roadworks.”

SRL’s Multiphase ADS is available for hire as well as sale and joins an extensive product portfolio that also comprises variable message signs (VMS), CCTV, and the Urban64 traffic signal solution used to coordinate multi-directional flows of traffic and pedestrians.

Established in 1997, SRL offers the UK and RoI’s widest distribution network, comprising 30 depots – including the UK’s largest – and facilitating swift and environmentally sustainable delivery.  The company provides a market-leading level of service and is the only ITS manufacturer available to customers on site 24/7, 365 days a year.

It is ISO-accredited in quality management (9001), environmental management (14001) and occupational health and safety (45001) and in July 2021, became a RoSPA sliver award winner for actively promoting the health and safety of staff.

(Picture – SRL)


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