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Print Posted By Aaquib Jawaid on 11/04/2017

Metro Line LRT trains running slower following signal failure

Metro Line LRT trains running slower following signal failure

Trains on the Metro Line LRT are once again running at reduced speed while an investigation is underway to determine why crossing arms lifted before a train crossed an intersection while departing NAIT on Monday just after 6 a.m.

A fail-safe mechanism worked as intended, stopping the train before it reached the intersection, Edmonton Transit manager Eddie Robar said Friday.

“If something irregular happens on track, the fail-safe in the system is to do what is called a mandatory brake application, so that system went into fail-safe mode and shut that train down,” Robar said.

He called the fail-safe “effective.” No one was injured.

“The fail-safes that are in place on the line all acted as it should have,” Robar said. 

The cause of the problem is still unknown, so the Metro Line has been put on a mandatory speed restriction. 

The slower speeds have not impacted service frequency.

The Metro Line, which was supposed to be up and running in April 2014, was delayed and did not begin running at full speed until last February.

In a separate incident July 6, gates had a delayed response in coming down at a crossing and the LRT operator manually applied the brakes.

Robar said an investigation determined around Aug. 30 that a software issue with the signalling system was to blame and a software patch was engineered.

“There’s no doubt that we’ve had challenges with the system itself,” he said, adding until the root cause of the latest arm malfunction is determined, he couldn’t blame the software.

Thales Canada is the company responsible for implementing the signalling system on the line.

Source: Edmonton Journal

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