Adding Segments Before Station 0+00… Mystery Solved

I always had a problem when I needed to add additional alignment segments in front of station zero.  Sure, the curves worked out fine, but tangents never seemed to want to give me what I needed….  I would wind up reversing the alignment, adding segments to the “end” then re-reversing the alignment to get station zero back where I needed it.

This seemed to be more of an issue when I was making transition alignments and my corridor was already dependant on the direction of the stationing. 

However, last week, one of the Autodesk folks showed me what I was missing.  The key is not to pick the tangent start point from Station 0+00.  Pick it to END at Station 0+00

Click MORE for some captures to help explain it…

Comments are closed.