The document discusses the user interface and tools in AutoCAD Civil 3D. It describes the standard AutoCAD tools and additional civil design tools in the interface. It then explains key tools for creating points, surfaces, alignments, parcels, profiles, assemblies, corridors, intersections, sample lines, section views, and pipe networks. Civil 3D allows users to design civil engineering projects with tools for terrain modeling, road design, pipe networks, and other tasks.