The new AutoCAD Civil 3D 2015  has improved engineering workflows with tools that help you maintain more reliable data, respond more rapidly to design changes, and the ability to simplify design tasks.  The new features in this civil engineering design software includes:

Corridor Features

  • Frequency of sampling (target and baseline)
  • Sampling improvements
  • The ability to retain corridor targets when substituting a subassembly

Profile Layout Features

  • The ability to extend  curves and tangents to profile extents
  • Using pass through point to create a free curve
  • The ability to change Parameter Constraints on selected curve
  • The ability to Lock profiles/with notifications that alert users if Horizontal Alignment changes impact Vertical Alignments.

Drafting Features

  • The ability to re-associate various Surface and Alignment labels
  • The ability stagger “Corridor Point” section labels

User Interface

  • The software has improved consistency between the AutoCAD Civil 3D and AutoCAD user interface/command set
  • The software has improved graphics, enhanced visual feedback and object selection

Subassembly Composer

The ability to build custom subassemblies more easily. Improvements include:

  • Voids in shapes
  • Axis of Rotation
  • Rail Cant

Geographic Location

Has the new capability to capture and embed Online Map Data (e.g., aerial map information) for offline viewing and plotting

Point Cloud

Point cloud files have improved performance and flexibility.

Interoperability and Data Exchange

  • Export to Keyhole Markup Language (KML)
  • Enhanced export capabilities for DWG and DGN
  • The ability to open and edit AutoCAD Civil 3D 2015 drawings in AutoCAD Civil 3D 2014 and 2013 software

This information was derived from

https://www.autodesk.com/store/autocad-civil-3d/what_s-new