This is an invisible turntable for use with aircraft.
The turntable has a span of 60 metres to accommodate larger aircraft, and operates at 0, 180 and 360 degree (it turns aircraft 180 degrees or 360 degrees). It is set so the turntable track is at ground level, but is height adjustable. The entrance tracks are a yellow invisible line, which can be updated to match an attached track, for example, if you do not want the yellow line to show, connect one of my invisible tracks to each end of the turntable and the table tracks will be invisible in Driver. In this case, the table has two small transverse yellow lines at the ends of the rotating track so you can see the ends.
If you wanted to show a non moving yellow line across the table instead of the invisible track, select the yellow track line from the ends of the table, place a length near the table, then holding the Shift key down, drag each end of the new line over the table to place near the transverse lines, and release. Using the shift key prevents the line attaching to any of the track on the table, so it will not be used incorrectly by the aircraft.
Operation: Stop the aircraft in the centre of the turntable, so no wheels are over the yellow lines at the table ends. Rotate the table using the red rotation arrows if possible. As some aircraft are large, they can hide the rotation arrows so they cannot be selected using the mouse. In this case use the Move Turntable Rule to rotate the table. See my website for information on how to set up the rule for turntable use -
http://www.ianztrainz.com.au/project6.htm