"Metrorail reactivated the Alexandria Rail Yard (C99) Automatic Train Control (ATC) system over the safety-based objections of Metrorail's subject matter experts, the ATC Engineering Department"
#wmata
#wmata
https://twitter.com/MetrorailSafety/status/1426190991065747464
WMSC has a slight bit of detail about the Potomac Yard ATC signaling design delay in today's latest findings. The initial design didn't align with #wmata standards, and the agency wasn't following them. Metro itself delayed the project to fix the deficiency. 
And in this paragraph, the WMSC says #wmata 's currently-ongoing Red Line tunnel ventilation project began construction before doing a hazard analysis, and the construction has resulted in new columns partially blocking an emergency egress route from the tunnel to surface.
"Metrorail stated that the Safety Department's safety certification group 'was not included in the review of the [Request For Proposal] design documents' and that '#WMATA is in the early stages of evaluating design options to address this hazard.'"
https://twitter.com/MetroReasons/status/1426193645171089421
WMSC key takeaways: #wmata has a "general lack of understanding" of the importance of safety certification (i.e. departments following Metro's rules) and the Safety department apparently has a "lack of authority" to control the process.
Not sure if there's any relation to today's @MetrorailSafety report, but power to the entire Alexandria Yard was brought down ~2 hours ago for ATC switch verification work. #wmata
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