Skew line between two parallel curves

Hi guys,

I need some help with the following problem.
Imagine that the middle curve is the road axis and a line that is perpendicular to it is the support line.
I want to make this line switchable between perpendicular and skew with the option of choosing the angle.

The option of moving the line along the road axis need to remain.

Any ideas? :slightly_smiling_face:
Thank you