During November 1992, Hoofddorp train station was undergoing reconstruction, especially the southern section that was being remodelled due to the extension of the railway yards in the area.
For some time, an S-turn was required on a part of the route.
For the construction of this, a tamping machine came to Hoofddorp to construct this S-bend, suitable for 90 km/h.
However, the tamping machine quickly became defective and the workers were required to build the curve with other materials.
This meant that the arc jets were made tighter with this replacement material, with sharper bends and consequently a lower maximum speed.
The work was completed by early Monday morning, the bypass S-curve being opened at a speed of 90 km/h.

On 23 November 1992, the speed of 90 km/h turned out to be too high for this track section.
After six trains passed the S-curve, with very sharp vibration, the dispatcher was asked by its superiors to apply a speed restriction of 30 km/h at 8:26 AM.
Further inspection added a speed increase to 60 km/h.
During November 1992, Hoofddorp train station was undergoing reconstruction, especially the southern section that was being remodelled due to the extension of the railway yards in the area. For some time, an S-turn was required on a part of the route. For the construction of this, a tamping machine came to Hoofddorp to construct this S-bend, suitable for 90 km/h. However, the tamping machine quickly became defective and the workers were required to build the curve with other materials. This meant that the arc jets were made tighter with this replacement material, with sharper bends and consequently a lower maximum speed. The work was completed by early Monday morning, the bypass S-curve being opened at a speed of 90 km/h.
On 23 November 1992, the speed of 90 km/h turned out to be too high for this track section. After six trains passed the S-curve, with very sharp vibration, the dispatcher was asked by its superiors to apply a speed restriction of 30 km/h at 8:26 AM. Further inspection added a speed increase to 60 km/h.
Hoofddorp train accident