Block - A length of track having defined limits.,The use of which is governed by block signals, block-limit signals, automatic speed control or any combination thereof.
Absolute Block - A block established between block stations, block limit stations, interlockings or any combination thereof whi...
Signals &Definitions LIRR Exam Block - A length of track having defined limits.,The use of which is governed by block signals, block -limit signals, automatic speed control or any combination thereof. Absolute Block - A block established between block stations, block limit stations, interlockings or any combination thereof which must not be occupied by more than one train except as provided by the rules Automatic block signal system - A block signal system wherein the use of each block is governed by an automatic block signal,cab signal indicator or both. Block signal system - A series of consecutive blocks Single Track - A main track upon which trains are operated in both directions. Siding - A designated track adjacent to a main track for the meeting or passing of trains. Two or More Tracks - Two or more main tracks upon which trains are operated as designated in the special instructions. Yard - A system of tracks, other than main tracks, secondary tracks or sidings, used for making up trains, storing cars and other purposes. All movements are subject to prescribed signals, rules and special instructions. Yard Limits - A portion of single main track between yard limit boards, as specified by special instruction. Camp Car - Any on -track vehicle, except a wreck train, that is used to house railroad or contract employees. Extra Train - A train not authorized by a timetable schedule. It must be designated as: passenger extra —for passenger train extra. Work Extra —for work train extra. Track car extra —for track car extra. Extra —for any other extra train except passenger extra, work extra or track car extra. Limited speed - A speed not exceeding 40 mph Maximum authorized speed(Mas) - The highest speed that is permitted over a specific portion of the railroad. It may be authorized by the special instructions of the current timetable, rules of the operating department or any other publication authorized by the General Superintendent -Transportation Medium speed - A speed not exceeding 30mph, except in ASC territory, train will be governed by speed displayed on the cab signal indicator not to exceed 40 mph Reduced speed - A speed at which a train can be stopped short of another train or obstruction. Restricted speed - A mode of operation, at which a train can be stopped within one half the range of vision, short of the next signal, another train, obstruction, derail, or switch improperly lined, looking out for broken rail or crossing protection not functioning, not exceeding 15 miles per hour.
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