![]() In the future, he says, LDT technology will support more and more ‘on terrain behaviour’: the actions and reactions of citizens within the urban system. “Some of these technologies made data more abundant, some easier to handle and understand, and some made data a key determinant of the behaviour of smart city systems themselves such as smart traffic lights, smart lamp posts, and smart road blockers,” explains Raes. Improved and interacting simulation models also better predict the effect in different policy domains such as the impact of mobility measures on air quality or noise thanks to linked air quality and noise models. This includes advanced 3D modelling, IoT infrastructures that generate vast amounts of data through widespread sensor networks, open data portals, high-performance cloud computing, and complex visualisation tools able to present data in more insightful ways than ever before. LDTs are not a single technology, but a collection of technologies, including some that only matured in recent years. “We learned a lot from this experience and believe others will too, so we proudly shared our lessons to help others on their LDT journey,” adds Raes. In the DUET project, an international consortium of 15 partners and technology providers worked alongside city and regional administrations to find transferable solutions based on the context of each city. DUET’s LDTs enable city planners to input proposed urban changes or solutions to problems such as congestion, and visualise the potential fallout from their decisions. ![]() DUET’s pilot cities – Flanders, Pilsen and Athens – are among the first cities in Europe to adopt this pioneering technology. Now there are enough smart sensors to paint a representative picture of a city’s systems, such as transport, energy, environment and infrastructure.īuilding on these advances, the EU-funded DUET project has created (‘ local digital twins’), virtual representations of a city’s infrastructure and systems, and how they relate to the local environment. The concept of virtual cities has been around for decades, though the underlying technology hasn’t been quite advanced enough to capture overall urban dynamics. Creating digital twins of Europe’s cities “Our virtual cities can also effectively communicate the impact of decisions among policymakers, politicians, social groups and citizens,” he says. “Cities may want to understand how a bridge closure will affect traffic in nearby streets, what will happen to air pollution, and so on,” explains Lieven Raes, an advisor at Digital Flanders in Belgium, and DUET project coordinator. This includes finding optimal solutions to problems faster, cheaper and more safely. ![]() Yet most of this data still goes unused, presenting a huge opportunity for policymakers and city planners to gain insights and work more efficiently. With the arrival of new technologies such as the internet of things (IoT), sensors are spread increasingly throughout urban areas, collecting and sharing data about how things are running.
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