Hold 'Ctrl' key and click on the line so you can add more 'pins'....
Adding more 'pins' also adds more corridor control lines too...
Either used view 1 (2D above or 3D view & turn on wireframe mode (W key) to make sure they're central to the track.
The end 'pins' that join Pit Lane to the main/fast path can only be moved in 3D view, the others can be moved in any view....
I personally refer to those little blue dots as 'pins' because they only hold the AIW lines, they have nothing to do with the spacing of the AIW way points...