Intermodal transport systems are vital for economic growth and development in South Africa and the Southern African Development Community (SADC) region, Gauteng Roads and Transport MEC Dr Ismail Vadi said during a presentation at the fifth edition of the South Africa-Italy Summit/Indaba on Tuesday. Intermodal transportation systems which fully integrate transport systems, engender interconnectedness and operate seamlessly, are being championed for both South Africa and other SADC countries.