...battery, resistor, rails, insulated rail joints, bonds, relay series resistor, and relay. — A block is a length of track of defined limits, the use of which...is governed by block signals, cab signals or both. Simple description of how a signal system works. — With an unoccupied block, the track battery current...

...primary radars fitted with certain forms of fixed echo suppression. (FAA4) Blind Zone: See Blind Spot. Block: A length of track of defined limits, the use...is governed by block signals, cab signals, or both. (49CFR236) Block Signal: A roadway signal operated either automatically or manually at the entrance...

...primary radars fitted with certain forms of fixed echo suppression. (FAA4) Blind Zone: See Blind Spot. Block: A length of track of defined limits, the use...is governed by block signals, cab signals, or both. (49CFR236) Block Signal: A roadway signal operated either automatically or manually at the entrance...

...falling snow has ended, it is termed a ground blizzard. BLM See Bureau of Land Management. block Rail. The amount of light obscured by particulate pollution in the air; clear window glass has block and tackle A combination of a rope or other line material and an independent pulley. Used to...

...Jan. 10, 1979, as amended at 53 FR 28599, July 28, 1988] § 218.5 Definitions. Absolute block means a block in which no train is permitted to enter while it is occupied by another train. Blue signal means a clearly distinguishable blue flag or blue light by day and a blue light at night....

...part of a semaphore arm which shows the position of the arm. 49 CFR Ch. II (10-1-03 Edition) $236.708 Block. A length of track of defined limits, the use...segment or quadrant to hold the lever in position. § 236.71 1 Bond, rail joint. A metallic connection attached to adjoining rails to insure electrical...

...Blade, semaphore. The extended part of a semaphore arm which shows the position of the arm. § 136.708 Block. A length of track of defined limits, the use...is governed by block signals, cab signals, or both. § 136.709 Block, absolute. A block in which no train is permitted to enter while it is occupied by...

...Blade, semaphore. The extended part of a semaphore arm which shows the position of the arm. § 136.708 Block. A length of track of defined limits, the use...is governed by block signals, cab signals, or both. § 136.709 Block, absolute. A block in which no train is permitted to enter while it is occupied by...

...by paragraph (c) of Section 26 of the Interstate Commerce Act as amended August 27, 1937 as follows: 'Block. A length of track of defined limits, the use...trains is governed by block signals, cab signals or automatic train control.' "By the same authority the term 'Block Station' is defined as follows: 'Block...

...battery, resistor, rails, insulated rail joints, bonds, relay series resistor, and relay. — A block is a length of track of defined limits, the use of which...is governed by block signals, cab signals or both. Simple description of how a signal system works. — With an unoccupied block, the track battery current...