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Mysterious blue lines next to the profile view

Updated: Nov 20, 2019

Some Civil 3D users may experience that strange blue lines appear next to a profile view:

To remove these lines, recalculate the superelevation and tick off the Apply curve smoothing option (if the project allows not to use curve smoothing):


Note: Apply curve smoothing is mostly used for railway design but it can also be used for road design. It smoothens the rail or road edge profile:


#Superelevation #ProfileView #LongitudinalSection #CurveSmoothing