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WMSC concurs to expand automatic train operation to Green and Yellow lines after safety review; station overruns remain under scrutiny

5344520 · June 10, 2025
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Summary

The Washington Metrorail Safety Commission on a June public meeting said it concurred May 20 that MetroRail substantially met safety certification requirements to activate automatic train operation (ATO) on the Green and Yellow lines while continuing oversight of station overruns, antenna normalization for 7,000-series cars and other mitigations.

The Washington Metrorail Safety Commission said it has concurred that MetroRail substantially met the safety certification requirements needed to activate automatic train operation, or ATO, on the Green and Yellow lines.

Paul Smith, WMSC director of systems engineering, told commissioners the agency reviewed MetroRail responses to a May 5 set of specifications that included formalizing an ATO governance committee, a schedule to complete antenna normalization for the 7,000-series railcars and a plan to disable the cancel-station-stop button on railcars. "The WMSC reviewed these responses and found that WMATA had substantially complied with the safety certification requirements. This led to the WMSC's concurrence for activating ATO on green and yellow lines on May 20," Smith said.

Why it matters: ATO changes how trains accelerate, brake and stop automatically; the WMSC’s concurrence does not end oversight. Commissioners and staff emphasized continued data-driven review…

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