01999nam 2200481 450 991071676880332120210830172947.0(CKB)5470000002524486(OCoLC)1263248107(EXLCZ)99547000000252448620210810g20199999 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierAcoustical warning devices as emergency warning systemsWashington, DC :U.S. Department of Transportation, Federal Railroad Administration, Office of Research, Development and Technology,2019-1 online resource (volumes) color illustrations"DOT/FRA/ORD-19/40"--Phase 1."DOT/FRA/ORD-21/13"--Phase 2."Final report, October 2019"--Phase 1."Final report, March 2021"--Phase 2."Performing organization: Foster-Miller, Inc. & Harris Miller Miller & Hanson Inc."--Phase 1, report documentation page."Performing organization: QinetiQ North America & Harris Miller Miller & Hanson Inc."--Phase 2, report documentation page.Includes bibliographical references.Emergency communication systemsUnited StatesSirens (Signaling devices)RailroadsSafety appliancesUnited StatesTechnical reports.lcgftEmergency communication systemsSirens (Signaling devices)RailroadsSafety appliancesUnited States.Federal Railroad Administration.Office of Research, Development and Technology,Foster-Miller.Harris, Miller, Miller & Hanson Inc.QinetiQ North America (Firm)GPOGPOBOOK9910716768803321Acoustical warning devices as emergency warning systems3261001UNINA