I am trying to get a curve from the intersection with a distance of 2.000 on both sides from the intersection.
I am doing something wrong, but I do not know what. Do you might know what I am doing wrong?
Thank you for your response. 
problem parameter 00.gh (43.9 KB)
Here’s a “brute force” way:
problem parameter 00_help.gh (54.3 KB)
sometimes curve direction(s) is the problem, so I flipped some there - maybe incorporate into the logic you had
EDIT
Thank you 
Because of your help, I understood how I could make it, and made a shorter version of it.
problem parameter 02.gh (132.0 KB)