Automatic Warning System
The Automatic Warning System (AWS) is a form of limited cab signalling and train protection system introduced in 1956 in the United Kingdom to help train drivers observe and obey signals. It was based on a 1930 system developed by Alfred Ernest Hudd and marketed as the "Strowger-Hudd" system. An earlier contact system, installed on the Great Western Railway since 1906 and known as Automatic Train Control (ATC), was gradually supplanted by AWS within the Western Region of British Railways.
Read more about Automatic Warning System: Principles of Operation, British Rail AWS, Bi-directional Operation, Liberia, Use Overseas, Other Countries
Famous quotes containing the words automatic, warning and/or system:
“Predictions of the future are never anything but projections of present automatic processes and procedures, that is, of occurrences that are likely to come to pass if men do not act and if nothing unexpected happens; every action, for better or worse, and every accident necessarily destroys the whole pattern in whose frame the prediction moves and where it finds its evidence.”
—Hannah Arendt (1906–1975)
“No longer mourn for me when I am dead
Than you shall hear the surly sullen bell
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Nay, if you read this line, remember not
The hand that writ it; for I love you so,
That I in your sweet thoughts would be forgot,
If thinking on me then should make you woe.”
—William Shakespeare (1564–1616)
“Predatory capitalism created a complex industrial system and an advanced technology; it permitted a considerable extension of democratic practice and fostered certain liberal values, but within limits that are now being pressed and must be overcome. It is not a fit system for the mid- twentieth century.”
—Noam Chomsky (b. 1928)