Since the release of Civil 3D Feature Lines, their interaction has plagued us. We discussed this very issue in a previous 2014 blog article, Grading Gone Wrong.
Autodesk took the hint and added in the use of Feature Line styles to control the Split point resolution within the Sites > Feature Lines > Properties…
In the NEW Release of Civil 3D 2017, Feature Lines can now be created as “siteless” by selecting the <None> option for a site. The behavior will be similar to how Alignments are “siteless”.
Similar to placing Feature Lines in separate Sites, by putting them in the <None> site, no interaction will occur.
However, the Feature Lines must be housed within a Site if Grading Objects are to be created from them.
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