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ITSReviewAnnual2015

Demonstration User Network / UTC Real time trac data UTC System TRL uTRAQ -Urban Trac Management and Air Quality Server AQ Data Feeds Met Data Feed(s) www.its-ukreview.org 61 import information gained from Earth Observation data, through the MACC service, is invaluable. As part of the decision support module, being developed by TRL (in the top right of Figure 1), the user will be able to define the local priorities when identifying strategies and then test the strategies to identify the optimal solution. The uTRAQ system recommends an optimal strategy to use but shows the user possible alternatives – this is the key operational principal of the decision support module. A key differentiator from earlier efforts in this field is the direct interaction between the traffic model and the existing SCOOT network: the current state of the network will be the starting point of any traffic simulation and scenario testing in conjunction with the air quality model with a rapid turnaround time. The existing UTC system retains overall control of the traffic control infrastructure, continuing with its second-by-second optimisation, and receives higher-level strategy recommendations from the uTRAQ system, which will influence longerterm optimisation trends; this also ensures a failsafe situation in the event of a system failure or loss of connection to the service. Differentiating uTRAQ from the previous iterations is full UTC integration. In the demonstration project, the system will run in a live environment, operating under supervision, where the traffic management operator is advised of a strategy, which can then be manually entered into the UTC, via the Common Database; alternatively uTRAQ can push the strategy to the Common Database with minimal user intervention. In short, the demonstration will be capable of operating TSS - Transport Simulation Systems in a supervised or fully autonomous manner, providing strategies to the UTC system that will directly affect its optimisation calculations, and thus taking effect on-street. Three Demonstration Sites Over the course of the next year, the uTRAQ system is due to be implemented and tested at three locations, each one testing the system on a larger scale. The first of these is through Leicestershire County Council and involves the A6 corridor (London Road) from Ashtree Road in Oadby at the southern end to the Victoria Park roundabout at the northern end, which is just inside the city boundary. The A6 approaches the city from the south east and is considered to be one of the busiest stretches of road in the county. Significantly, the main Leicester ring road crosses this route and it also receives a large number of minor tributary roads. With the assistance of Leicester City Council, the systems will later roll out to include most of the City and some adjacent sites in the County including up to 122 controlled junctions, most of which have SCOOT. Lastly a demonstration in Northampton will include up to 66 road junctions, most of which have SCOOT. With air quality and traffic management considered high priority policy issues for both central government and local authorities, the future is bright for further development of the uTRAQ approach. As local authorities are reluctant to replace existing air quality or traffic management infrastructure, a key strength of the system is its modular nature, which will be able to interface with other existing and future advanced traffic management systems (ATMS). ◆ TRL University of Leicester Data Con dence Filter Con guration Module Detected Trac Paern Trac Forecast Quality Module Trac Management Operations Trac Forecasts Decision Support Module Best Strategy Selection Hilstorical O/D Matrices Historical Trac Data Paern Matching Module Con guration Module Selected Matrix Aimsun Module Parallel Simulation Air Quality Model Parallel Con guration Simulation Module Air Quality Forecasts AQ Forecast Quality Module  Figure 1: uTRAQ system architecture. Aimsun traffic modelling software is developed and supported by TSS-Transport Simulation Systems. By Christopher Kettell, TRL; Mark Brackstone, Jordi Casas and Josep Maria Aymami, TSS–Transport Simulation Systems; Roland Leigh, Ed Lamb and Antoine Jeanjean, University of Leicester  Extent of Leicester City and A6 test site


ITSReviewAnnual2015
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