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:
“It was not till the middle of the second dance, when, from some pauses in the movement wherein they all seemed to look up, I fancied I could distinguish an elevation of spirit different from that which is the cause or the effect of simple jollity.In a word, I thought I beheld Religion mixing in the dance.”
—Laurence Sterne (17131768)
“The Cossack eats Poland,
Like stolen fruit;
Her last noble is ruined,
Her last poet mute:
Straight, into double band
The victors divide;
Half for freedom strike and stand;
The astonished Muse finds thousands at her side.”
—Ralph Waldo Emerson (18031882)
“Twenty men crossing a bridge,
Into a village,
Are twenty men crossing twenty bridges,
Into twenty villages,
Or one man
Crossing a single bridge into a village.”
—Wallace Stevens (18791955)
“The most difficult crime to track is the one which is purposeless.”
—Sir Arthur Conan Doyle (18591930)