Zanthus Train Collision - Aftermath

Aftermath

Since the accident, the operation of the points has been altered so that the point indicator lights will not operate until the access process is completed, and this gives all trains time to stop at the red point indicator lights.

The simplified overview of process is:

1. access box - 120-180 second delay all line points are/changed to red
2. door opens
3. 60-90 second delay until point control inputs are accepted, points can then be changed.
4. close door/seal box, lights are changed to indicate point positions.

All traffic then proceeds as directed.

This accident happened because the points were not fully interlocked, and were merely a kind of power-assisted hand lever, with automatic normalisation.