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ARC-Authentication-Results (abbreviated AAR) - A combination of an instance number (i) and the results of the SPF, DKIM, and DMARC validation ARC-Seal (abbreviated AS ) - A combination of an instance number (i), a DKIM-like signature of the previous ARC-Seal headers, and the validity of the prior ARC entries.
What are now New Jersey Transit's Morris & Essex Lines (the Morristown Line and Gladstone Branch) and Montclair-Boonton Line were electrified by the Delaware, Lackawanna and Western Railroad at 3000 V DC in 1930/31. [25] By August 1984 the lines had all been converted to 25 kV 60 Hz by NJ Transit. [26]
AN/AAR-47(V)1 Original version providing missile warning with IR detectors. AN/AAR-47(V)2 Adds laser warning sensors to the optical sensor modules and extends temperature operation range and operational life. [11] AN/AAR-47A(V)2 Adds UV detectors, increases detection sensitivity and extends temperature operation range and operational life. [10]
The primary exception to this situation is in the field of heavy rapid transit, such as subways and elevated lines, which make use of a localization of the British practice, or a combination of the AAR and British systems. Some freight railroads also still use route signalling.
A total of 4,586 PCC cars were purchased by United States transit companies: 1,057 by Pullman Standard and 3,534 by St. Louis. Most transit companies purchased one type, but Chicago, Baltimore, Cleveland, and Shaker Heights ordered from both. The Baltimore Transit Co. (BTC) considered the Pullman cars of superior construction and easier to work on.
Lemon Yellow (The AAR's official name) - Used in position light systems as an all-purpose high visibility color, greatest fog penetration. (Plain) White - Plain incandescent white light. Used in dwarf position light signals with frosted lenses. Individual signal heads may be set to flash a color to create a different signal aspect.
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The Metropolitan Transportation Authority (MTA) is a public benefit corporation responsible for public transportation in the New York City metropolitan area in the northeastern United States.