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38 Autumn/Winter 2021 T he 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%, potentially saving commuters more than a day a year journey time. Created by SRL Traffic Systems, which manufactures and supplies mobile intelligent transport system (ITS) equipment to the traffic management, construction, utilities and events sectors, Multiphase ADS was independently modelled by Ian CUTTING JOURNEYS BY HALF Independent traffic detection system cuts queue lengths by 50%. Routledge Consultancy. 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%.