The research project SIMETRI (SustaInable Mobility and Equality in mega-ciTy RegIons: patterns, mechanisms and governance) brings together researchers from UCL, Birkbeck University of London, King’s College London, VU Spatial Economics, Shenzhen University, Shenzhen Institute of Research and Innovation, The University of Hong Kong and Sun Yat-sen University. SIMETRI will develop a world-class science platform relevant to political decision-makers responsible for housing, transport, employment and urban development in the world’s biggest mega-city region, the Pearl River Delta Greater Bay Area. The platform integrates work on inequality indicators and predicting future land use and transport developed in western Europe in London and the Randstad with related work in Shenzhen and Guangzhou, producing a system that will use state-of-the-art simulation models, big data from routine transport, and new ways of using information technology for participatory governance. Within the project, Eric Koomen is responsible for developing the land use and transport modelling environment. SIMETRI is funded by the NSFC JPI Urban Europe programme.