Tallinn Digital Twin — EU-Backed 3D City Model for Planning and Citizen Engagement

As part of its Tallinn 2035 strategy to become a digital and green frontrunner in Northern Europe, the city launched a Digital Twin pilot to improve the accessibility of planning data and give both officials and residents tools to test development scenarios before they are built.

The pilot delivered a public 3D city model, accessible at 3d.tallinn.ee, that lets users see how a proposed residential development might affect traffic flow or how transport changes could ease congestion in specific areas. A parallel road-condition monitoring layer now covers roughly 1,200 kilometres of Tallinn's streets, and a 'GreenTwins' extension, developed jointly with Helsinki, digitally models green space so landscape and climate-adaptation changes can be tested before construction. A Smart City Planning Hub was set up in central Tallinn as a physical space with visualisation technology for bringing stakeholders into planning discussions.

The work is co-funded through the EU/Estonia-backed FinEst Twins programme (a EUR32 million grant establishing a Centre of Excellence for Smart and Sustainable Cities) and is shared with other cities via the European Urban Initiative's City-to-City Exchange, including an annual Tallinn Digital Twin seminar.

As an honest caveat: the documented results so far are pilot outputs — a live 3D model, a monitored street network, a physical hub — rather than a rigorous before/after evaluation of planning-decision quality or cost savings, and the project itself flags unresolved challenges such as obtaining underground utility data.

Read the full analysis: https://portico.urban-initiative.eu/urban-practices/european-urban-initiative/digital-twin