AutoCAD® Civil 3D® 2013 civil engineering software extends the value of your model with new workflows and productivity tools for civil infrastructure. With a focus on optimizing performance, the new features offer pressure pipe functionality, improved survey, base map creation, and new rail track design features. And, a host of transportation features have been enhanced, including corridor composition workflows, 3D navigation and interrogation, and surface boundary definition. Streamline your civil engineering projects with AutoCAD Civil 3D software.