The removal of the loop allowed for lighter trains and, according to park officials, a smoother ride.
Not long ago those fears were proved correct when the light train was attacked by rocks.
The lighter trains were used to reduce the overall load on the wooden structure.
The loop was also removed during this time to assist the lighter trains in completing the circuit.
A train moving against the spin is a light train, since the faster it goes the lighter you feel.
Five 99s were employed on the Vienna suburban lines in charge of light trains.
For lighter trains there is no need for locomotives, so every car in the train can generate revenue.
They were introduced in the course of the 1990s for hauling light trains, especially for commuter service.
In December 2006, however, the loop was removed to make it possible to use lighter trains.
They claim it is not only a much lighter train, but also has a much more advanced design.
