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If the overlap is long enough to extend from one stop signal to the next, then the effect is to provide two signal protection (or "double blocking"), with the first signal having a full overlap, and the second signal having a short overlap. With two signal protection, only one track circuit is needed between successive signals. However ...
Created Date: 8/30/2012 4:52:52 PM
The late merge method, also known as zipper merging, dictates that both streams of traffic should continue to drive up to the point of closure of one stream and merge at the marked taper. Both streams should create alternating gaps (like the teeth of a zipper) into which vehicles from the other stream can merge at the merge point (thus "zipping ...
Other terminology for a concurrency includes overlap, [3] coincidence, [4] duplex (two concurrent routes), triplex (three concurrent routes), multiplex (any number of concurrent routes), [5] dual routing or triple routing.
The overlap coefficient, [note 1] or Szymkiewicz–Simpson coefficient, [citation needed] [3] [4] [5] is a similarity measure that measures the overlap between two finite sets.It is related to the Jaccard index and is defined as the size of the intersection divided by the size of the smaller of two sets:
The Washington Commanders just barely survived a furious New Orleans comeback, tipping away a would-be game-winning two-point conversion with no time left on the clock. The Commanders claimed a 20 ...
Also known simply as a pull lap, it is the basic form of the lap joint and is used when joining members end to end either parallel or at right angles.When the joint forms a corner, as in a rectangular frame, the joint is often called a corner lap.
The .219 Zipper is the parent case of the .219 Donaldson Wasp, and P.O. Ackley created the .219 Zipper Improved in 1937. Leslie Lindahl's Chucker and Super-chucker and "wildcat" case modifications by Hervey Lovell, Lysle Kilbourne, and W. F. Vickery offered similarly superior ballistics in stronger single-shot and bolt actions.