However, when travelling downhill or running at line speed, only two are needed.
This is faster and more comfortable due to higher line speeds.
The line speed was about 250 cars per shift.
It has a line speed of between 80-100 mph.
By late October 1963, some 2,500 workers were laid off and the line speed was reduced.
This, along with increased line speeds, means that the station will be under 80 minutes from the capital.
Each has one bi-directional through road with straight track to allow full line speed.
Like many other workers, she disliked the 42-chickens-a-minute line speed.
For workers, line speed is one of the biggest issues.
It is planned to increase the line speed to allow services to stop in Illertissen every hour.