Civil 3D 2012 Transportation Extension

Autodesk has recently released the AutoCAD Civil 3D 2012 Transportation Extension.  This is available directly from the Autodesk support website.  The extension comes with an assortment of tools.  Some highlights are the following:

• Quickly hide all the Civil 3D labels.
• Find the high and low points on a surface.
• Work with more data formats (Star*Net, RD5, TP5).
• Create a surface from drawing entities in one command.

Please view the read-me file for more details.  Note that you can download the Civil 3D 2011 version of the extension here.