Civil 3D 2018 Reference Templates
A Quick Overview of Civil 3D 2018 Reference Templates
JT McManmon an Application Engineer at CAD Technology Center reviews the reasons and basic capabilities of 2018 Reference Templates.
A good basic overview. Some good questions answered too.
You might want to visit the Reference Template Settings in 2018.1 post that covers some of the more technical aspects of employing and implementing Civil 3D Reference Templates and tools.
The post also contains all the links to the entire Reference Templates series of posts.