Wikipedia
Teststrecke
Teststrecke, meaning Test Track in German, is a portable steel roller coaster owned by the German showman partnership Meyer & Rosenzweig. It was imported from Dorney Park & Wildwater Kingdom in 2008, and now generally tours in Germany, with occasional visits to the Netherlands. It was designed by the now-renowned ride engineer, Anton Schwarzkopf.
The trains on Teststrecke are themed to resemble racing cars and designed by Zierer. Each train has a single lap bars to secure riders in their seats. It can operate all three at peak times, but it runs with one when there are no queues.