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Notice; withdrawal.

On September 1, 2023, the Federal Railroad Administration (FRA) published a notice in the Federal Register announcing the availability of the Norfolk Southern Railway's (NS) request for amendment (RFA), dated August 28, 2023, to its FRA-certified positive train control (PTC) system. This document withdraws that notice, FR Doc. 2023-18996. On August 30, 2023, NS withdrew its RFA.

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