May urban digital twins spur the New Urban Agenda? The Spanish case study

The New Urban Agenda was conceived as a global endeavor to transpose the Sustainable Development Goals (SDGs) of the 2030 Agenda into urban areas. Both initiatives were merged into the Spanish Urban Agenda (SUA), which includes 10 strategic and 30 specific goals, among which leading and promoting digital innovation toward the development of smart cities stand out. As Urban Digital Twins (UDTs) are a technology that arises to enhance smart cities, this research aims at assessing how they may contribute to the achievement of the SUA. A framework was accordingly built to associate UDTs with the SUA to then be applied to the Barcelona digital twin as case study. A combination of an in-depth literature review on UDTs and the Delphi technique was used as methodological approach. More than 70 % of the strategic and specific goals included in the SUA, as well as the four sustainability dimensions are represented in the new instrument. The case study reflected a limited contribution in pursuing the SUA. Nevertheless, the proposed framework offers potential lines of action to reinforce the role of the Barcelona digital twin towards the SUA.