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Standards for North American railroad signaling in the United States are issued by the Association of American Railroads (AAR), which is a trade association of the railroads of Canada, the US, and Mexico. Their system is loosely based on practices developed in the United Kingdom during the early years of railway development.
The New York City Transit Authority also operates paratransit services branded as Access-A-Ride (AAR) for disabled customers who cannot use regular bus or subway service in New York City, and nearby areas in Nassau and Westchester counties, within MTA's three-quarter mile service area.
The AN/AAR-47 Missile Warning System is a Missile Approach Warning system used on slow moving aircraft such as helicopters and military transport aircraft to notify the pilot of threats and to trigger the aircraft's countermeasures systems.
The ARA became the Association of American Railroads (AAR) in 1934; the Signal Division was renamed the Signal Section and the Telegraph and Telephone was renamed the Communications Section. The two sections merged in 1961 to become the Communications and Signal Division of the AAR, which has now been merged into AREMA. Technical committees
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The Association of American Railroads ( AAR) is an industry trade group representing primarily the major freight railroads of North America ( Canada, Mexico and the United States ). [2] Amtrak and some regional commuter railroads are also members. Smaller freight railroads are typically represented by the American Short Line and Regional ...
Metro-North Railroad (reporting mark MNCW), trading as MTA Metro-North Railroad, is a suburban commuter rail service operated by the Metropolitan Transportation Authority (MTA), a public authority of the U.S. state of New York.
Positive train control. A Metrolink locomotive decal on an MP36PH-3C stating that it is equipped with positive train control technology. Positive train control ( PTC) is a family of automatic train protection systems deployed in the United States. [1] Most of the United States' national rail network mileage has a form of PTC.
Through the efforts of the Association of American Railroads (AAR), a number of companies developed automatic car identification (ACI) systems. The AAR selected four systems for extensive field tests. General Electric developed an RFID system, ABEX a microwave system, Wabco a black and white barcode system, and General Telephone and Electronics ...
Metropolitan Transportation Authority. The Metropolitan Transportation Authority (MTA) provides local and express bus, subway, and commuter rail service in Greater New York, and operates multiple toll bridges and tunnels in New York City. Overview.