Why did the tram network collapse on Tuesday evening?

Why did the tram network collapse on Tuesday evening?
Why did the tram network collapse on Tuesday evening?

TRANSPORT – The tram lines will be stopped this Wednesday an hour earlier, from 11 p.m., for a technical intervention on the faulty equipment causing the breakdown Tuesday evening

An incident which affected all four lines of the Bordeaux network. Tuesday evening, the four tram lines were “gradually interrupted” between 6:30 p.m. and 9:30 p.m., throughout the Bordeaux metropolis.

The reason ? “A loss of all communications with the trains,” TBM officials explained in a press release this morning. “The four tram lines A, B, C and D had to be stopped” because “the breakdown affected the PCC (central tram control station) of the network. » The PCC is the tool that allows the tram network to be managed in real time. Made blind, this led to the loss of railway signaling supervision, radio, the entire GTC (Centralized Technical Management), the position of the trains, and station information.

Similar failure in 2018 and 2020

“After twenty-five minutes of trying to restart the systems, the decision to return the tram trains to the depots was taken at 6:30 p.m.,” continues TBM. From 9:30 p.m. all service on the tram network was restored.

The incident was caused by a “broadcast storm”, namely “failed equipment which saturates the RMS (multi-service network) computer network”. The(…) Read more on 20minutes

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