Track Connections To The Rest of The System
Of the four shuttle tracks, only three are in use, the former southbound express track space being used for platform space at each terminal. The former southbound local track is now Shuttle Track 1; Track 2 no longer exists; the former northbound express track is Track 3; and the former northbound local track is Track 4.
Tracks 1 and 3 are connected to each other and to the Lexington Avenue Line's southbound local track south of Grand Central station. Track 4 connects to the Broadway–Seventh Avenue Line's northbound local track north of Times Square station. There is no connection between tracks 1 and 3 on the one hand, and track 4 on the other; therefore, although the shuttle was once part of the original through-route of the first IRT subway, it is now physically impossible for a train to go from the IRT Lexington Avenue Line through to the IRT Seventh Avenue Line or vice versa by using the shuttle tracks.
Read more about this topic: 42nd Street Shuttle
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—Harriet Tubman (1821–1913)
“The conclusion suggested by these arguments might be called the paradox of theorizing. It asserts that if the terms and the general principles of a scientific theory serve their purpose, i. e., if they establish the definite connections among observable phenomena, then they can be dispensed with since any chain of laws and interpretive statements establishing such a connection should then be replaceable by a law which directly links observational antecedents to observational consequents.”
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“For the universe has three children, born at one time, which reappear, under different names, in every system of thought, whether they be called cause, operation, and effect; or, more poetically, Jove, Pluto, Neptune; or, theologically, the Father, the Spirit, and the Son; but which we will call here, the Knower, the Doer, and the Sayer. These stand respectively for the love of truth, for the love of good, and for the love of beauty.”
—Ralph Waldo Emerson (1803–1882)