Centre

The middle of the track was made in a similar way to the first part. It is comprised of 2 boxes on a scaled version of the initial line that have been flattened.

The chain in the centre is a plane made in the same way, with a custom-made chain texture on it.

The two outer lines on the middle are also created this way using boxes.

The bars connecting the outer part and the inner part were made using the spacing tool to duplicate them down the line.