Now we put down the second track (fig.11) by placing splinepoints parallel to the existing ones spaced according to the spacing of track we desire (see above). During building procedure this looks pretty strange occasionally, but this gets straight in the end, when all splinepoints are connected and tracks straightened.
fig.11
Should look somewhat like fig.12 and of course check from different points of view in fig.13.
fig.12
fig.13
After removal of the rulers and trees (observe local laws for protection of the environment) the curve is well defined now (fig.14).