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 mixing, double, single and/or track:
“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)
“...the shiny-cheeked merchant bankers from London with eighties striped blue ties and white collars and double-barreled names and double chins and double-breasted suits, who said “ears” when they meant “yes” and “hice” when they meant “house” and “school” when they meant “Eton”...”
—John le Carré (b. 1931)
“I don’t like your miserable lonely single “front name.” It is so limited, so meagre; it has no versatility; it is weighted down with the sense of responsibility; it is worn threadbare with much use; it is as bad as having only one jacket and one hat; it is like having only one relation, one blood relation, in the world. Never set a child afloat on the flat sea of life with only one sail to catch the wind.”
—D.H. (David Herbert)
“He who rides and keeps the beaten track studies the fences chiefly.”
—Henry David Thoreau (1817–1862)