Create Center line from two Polyline in Civil 3d 

Thanks u sir 😊

U may create it from line properly

@@naseerbhatti177 can u explain how pleas

Sir, i have never try it before.

Please watch this video till to end. In this video I have explained the topic in full details how can extract center line of any surface or between two lines

I got a same problem after add breaklines and nothing happens at center

@@frostberryzaber1620 make sure I r user define contours layer is on

@@naseerbhatti177 How can I enable l r user define contours?

@@frostberryzaber1620 select U r surface right click n choose edit surface from right click menu. Here U will get user contours layer turn it on n click apply ok Now select surface in model space ribbon will be charged from ribbon click on extract object from surface option now extract user define contours n U r contour will be appeared in dgw model space

Calculate the 6 deg offset distance in 2d plan n create u r desire offset as required now select the create these line n go to property window n enter the elevation as required.

@@naseerbhatti177 okay let me check

@@naseerbhatti177 didn't work.

@@JitendraKumar-pl9ny can u share example dwg file exactly what is u r requirements.?

@@naseerbhatti177 where i can share.? I have do draw a picture.