This document discusses how transport interchanges can catalyze city development. It notes that cities are economically important and that transport underpins good economic performance by facilitating business, increasing workforces, and supporting evening/leisure economies. Transport also enables sustainable city growth by reducing sprawl. The document presents case studies of transport interchanges driving development in cities like Lille, Manchester, and Lisbon. It argues that transport interchanges can reinforce business hubs, serve as a focus for long-term planning and high densities, and create public spaces to maximize benefits for cities.