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:
“Political image is like mixing cement. When its wet, you can move it around and shape it, but at some point it hardens and theres almost nothing you can do to reshape it.”
—Walter F. Mondale (b. 1928)
“He does me double wrong
That wounds me with the flatteries of his tongue.”
—William Shakespeare (15641616)
“And a single small cottage, a nest like a doves,
The one only dwelling on earth that she loves.”
—William Wordsworth (17701850)
“What joy when the insouciant
armadillo glances at us and doesnt
quicken his trotting
across the track into the palm brush.
What is this joy? That no animal
falters, but knows what it must do?”
—Denise Levertov (b. 1923)