Use drawing templates to eliminate duplication of effort and to help maintain consistency across drawings.
You start a new AutoCAD Civil 3D drawing using a template file. An AutoCAD Civil 3D drawing template can contain standard AutoCAD information, such as AutoCAD settings and layers, and AutoCAD objects, such as lines and text. In addition, it can include any AutoCAD Civil 3D drawing information that is listed in either the Settings tree (including AutoCAD Civil 3D settings, styles, label styles, tables, description keys, and point import/export formats) or the Prospector tree (including any AutoCAD Civil 3D object, such as point groups).
AutoCAD Civil 3D drawing templates are included in the product.
Maintaining a standard for the use of layers in your drawing is easier if you have a drawing template with predefined layers, and styles that reference those layers when objects are created.
Consider designing styles to reflect the information requirements at different times in the project.
Create a new template from an existing drawing.