With urban populations expected to double by 2050, an increasingly urgent need exists for implementing sustainable urban design and infrastructure rehabilitation initiatives. Digital 3D models of our urban infrastructure form part of the solution as engineers, architects and geospatial professionals collaborate and share information across the infrastructure lifecycle. This presentation explores the reasons behind developing such a model and examines the convergence of the information and technology needed to make it real such as Smart Infrastructure Modeling (SIM), CAD, GIS and BIM. Demonstrations and plenty of eye-candy will be used to highlight the benefits. The presentation concludes with an examination of today’s trends and future opportunities as they relate to the emerging digital cities phenomena.