The National Transportation Safety Board is an independent Federal agency charged by Congress with investigating transportation accidents, determining their probable cause, and making recommendations to prevent similar accidents from occurring. The urgent recommendation in this letter is derived from the Safety Board's investigation of the recent collision of two Washington Metropolitan Area Transit Authority (WMATA) Metrorail trains on the Red Line at the Woodley Park-Zoo/Adams Morgan (Woodley Park) station. The Safety Board would appreciate a response from you within 30 days addressing the actions you have taken or intend to take to implement our recommendation.
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