Whist the cars can roll, they cannot turn, so a transfer system is used to allow the cars to complete the 2nd half of the course in reverse to get back to the station.

Ultra Twister

Ultra Twister

21 March, 2020 by Gazza

Whist the cars can roll, they cannot turn, so a transfer system is used to allow the cars to complete the 2nd half of the course in reverse to get back to the station.

In this photo