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TECHNOLOGY Microsimulation


Flow motion T


he Adige River flows through the centre of the Italian city of Verona and is crossed by many bridges.


One of these bridges, the San Francesco, is part of the main inner road system and serves traffic movements from and to the city’s eastern areas. After many years with heavy and increasing traffic it became necessary to implement a major resto- ration plan. This was expected to cause severe congestion with partial closures, reduction of available lanes and, finally, transformation from a two-way to a one- way road.


FLOW OPTIMISATION All the signalised junctions in the area (shown on the aerial photo) are oper- ated by Swarco’s UTOPIA traffic control system. With previous plans based on ordinary traffic conditions, new plans had to be set as traffic movements would change dramatically as a result of the capacity reduction on the San Francesco bridge. The traffic control department of the City of Verona, led by architect Bruno Pezzuto, decided to test plans for various stages of the maintenance and construction works programme offline. These tests were carried out by coupling UTOPIA to Cube Dynasim, a state of the art microsimulation system offered by Citilabs. A wide range of scenarios


Tor Vorraa on helping Verona to reduce its congestion during road maintenance and construction periods


were set up in Cube Dynasim that fed its results to UTOPIA which, in turn, pro- vided new signal timings to be tested in virtual reality in Cube Dynasim. These scenarios included major changes on the overall circulation scheme with new one-way roads as well as new complete design of some junctions. The simulation evaluates travel times on all routes, for private cars and for buses as well as for pedestrians.


ABOUT CUBE DYNASIM Cube Dynasim is a leading traffic micro- simulation software system used to model the operational impacts of changes to the built environment and to operating policy. Cube Dynasim takes into account


the true impact that individual intersec- tions, weaving areas, control devices, and transportation modes have on each other. It realistically emulates the flows of automobiles, motorcycles, trucks, buses, rail vehicles, bicycles and pedestrians. It provides detailed reports, analysis and 3D and 2D animations showing how the transportation system will function given the proposed changes. Cube Dynasim is a scenario-based


simulator, offering a completely dif- ferent user experience than any other microsimulation system. This approach provides a way to easily build, manage and run an unlimited number of simu- lation alternatives. Instead of managing directories of redundant simulations, the entire simulation project is built and managed within a single file. A scenario- based simulation system saves users huge amounts of time, effort and money.


Area traffic controlled by UTOPIA


ABOUT UTOPIA UTOPIA, developed by Swarco Mizar is an innovative adaptive traffic control system designed to optimise flows and give selective priority to public trans- port without sacrificing travel times for private traffic. UTOPIA Urban Traffic Control System offers a wide range of strategies designed to suit any road network. In the fully adaptive mode, it


Example of 3D animation in Cube Dynasim 20 thinkinghighways.com Vol 8 No 2 Europe/Rest of the World


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