Mixing Double and Single Track
Because double and single track may use different signalling systems, it may be awkward and confusing to mix double and single track too often. For example, intermediate mechanical signal boxes on a double-track line can be closed during periods of light traffic, but this cannot be done if there is a single-line section in between. This problem is less serious with electrical signalling such as Centralized traffic control.
Read more about this topic: Double Track
Famous quotes containing the words single track, mixing, double, single and/or track:
“It may seem strange that any road through such a wilderness should be passable, even in winter, when the snow is three or four feet deep, but at that season, wherever lumbering operations are actively carried on, teams are continually passing on the single track, and it becomes as smooth almost as a railway.”
—Henry David Thoreau (1817–1862)
“How natural that the errors of the ancient should be handed down and, mixing with the principles and system which Christ taught, give to us an adulterated Christianity.”
—Olympia Brown (1835–1900)
“Because I have work to care about, it is possible that I may be less difficult to get along with than other women when the double chins start to form.”
—Gloria Steinem (b. 1934)
“What has influenced my life more than any other single thing has been my stammer. Had I not stammered I would probably ... have gone to Cambridge as my brothers did, perhaps have become a don and every now and then published a dreary book about French literature.”
—W. Somerset Maugham (1874–1965)
“To most men, experience is like the stern lights of a ship, which illumine only the track it has passed.”
—Samuel Taylor Coleridge (1772–1834)