JR WEST RAILTEC Co., Ltd.

Tamping machine work methods generally fall into two categories, namely relative-standard work, in which maintenance is performed relative to the track on which the tamping machine is operating, and absolute-standard work, in which the actual track alignment is surveyed and the track is maintained to an ideal alignment.

While relative-standard work can be performed at a relatively low cost, it presents a challenge in that it makes it difficult to achieve an ideal alignment.
On the other hand, while absolute standard work can improve linear accuracy, it requires preliminary surveying and involves significant costs, time, and labor.

To address these challenges, RAILTEC utilizes reconstructed waveforms derived from data collected by track inspection vehicles, which allows us to significantly reduce labor and costs while maintaining a level of quality equivalent to that of absolute standard work.

We reconstruct the actual alignment based on track inspection data and a simple on-site survey, calculate the required displacement to achieve the ideal planned alignment, and prepare a restoration work plan.

Tamping machine work is carried out in accordance with the restoration work plan.

Our NtiRT system provides operational assistance, allowing the work to be performed by a tamping operator alone.
This eliminates the need for adjustments based on the operator’s experience or intuition, ensures consistency regardless of individual skill levels, and maintains a high degree of planning accuracy.

NtiRT enables other railway operators to utilize tamping technology based on restored track geometry profiles.
The system can be installed on existing tamping machines manufactured by Plasser & Theurer.


NtiRT is a system that performs track alignment calculations based on the LABOCS track maintenance management database system developed by the Railway Technical Research Institute (RTRI), a technical research company in the Japan Railways (JR) group.