Creating Sample Lines at PIs that Bisect the Angle between the Segments

[camden.n.dean]

Hello.

I tried searching the forum for posts about this, but could not find one.

Question: Is there a way to make the SLINs  drawn at PIs automatically bisect the angle created by an alignment?

Description: I have an alignment that is made only of straight segments. I am cutting cross-sections along this alignment. At most stations, things work well for me: all of the SLINs are perpendicular to the alignment. The issue is when the sample lines are draw at points of intersection. By default C3D is drawing the SLINs perpendicular to the heading of the incoming segment. I would like to be able to draw a sample line that bisects the internal angle of the incoming segment and the outgoing segment. Does this functionality exist in Civil3D?

For now, I am just having to painstakingly go in and redraw the alignment in a way that produces the results I want. I am going to each PI, finding the angle bisector, and drawing a short heading change (1' on either side of the PI) that is perpendicular to the bisector. This creates its own issues because now what should be a single PI is replaced with 2 PIs neither of which have the coordinates of the original PI. There must be a better way to do this, so please feel free to share any methodology that you think would be an improvement on my current workflow.

-Camden

[EliANewlines · Accepted solution]

I don't know of any way to automatically bisect the angles. However, instead of adding PIs to the alignment, why don't you use the grips on the sample lines to adjust them to bisect the angle? i.e. draw a polyline bisecting the angle, where you want your sample line to be, and then use the grips to snap to the polyline.

[camden.n.dean]

Ah! This isn't quite as elegant as I was hoping, but it is a big improvement on my current method. Thanks for the good idea!

I'm going to leave the post open for a few more days in case someone sees this and knows an elegant solution.