Since there isn't a "track" in the conventional sense, but a tunnel or tube, there's little to no chance of derailment.
The only thing I can think of that could cause a crash is a destruction of part of the tunnel or tube.
If a section of tube fails, the vacuum is lost, air rushes in and the pod slows down.
My biggest engineering concern is life support. To achieve these high speeds, it will be necessary to evacuate most of the air from the tunnel.
A moving platform in a near vacuum will require on board life support.
In the event of life support failure, I hope they have evacuation hatches at regular intervals throughput the tunnel.