crossroads using splines?

I created a Spline point and connected 3 lines to this point, but all three lines turned out with “artifacts”, that is, the further the line from the point, the more it expands in length, respectively, the closer it is, the more it narrows in length, this is a strange effect . By the way, I connected the lines into one point using Ctrl + N, while the road was very curved, and I corrected the rotation of the point along the Z axis and corrected the stretching of the curves (radius of the corners). By themselves, the lines look terrible, as they stretch. Still, how do I connect 3/4 lines to one point correctly, and how do I remove the effect of stretching line models.