Re-Generation in Transport Co-organised by the European Commission and supported by key European Technology Platforms, TRA (transport Research Arena) is a pivotal event in the field of transportation research, focusing particularly on: User-Centered Mobility, Green Mobility and Decarbonization, Planning and Operation, and Transport Digitalization. TRA connects all transport networks (road, rail, waterborne and aviation), bringing together researchers, engineers, infrastructure and traffic operation managers, transport operators, vehicle manufacturers, suppliers, public authorities, and other transport stakeholders and decision makers. The event provides a forum where they can exchange views and ideas on challenges and opportunities, and features demonstrations, innovative exhibitions, technical tours, and social events. The main topics of the TRA2026 conference are the following: User Centered Mobility Green Mobility and Decarbonization Planning and Operation Transport Digitalization