The train from Dundee ran past the Castlecary home signal in poor visibility but managed to stop just beyond it.
This was possibly superior to but definitely different from the speed signalling system of semaphore blade positions developed by A.H. Rudd and accepted as standard by the American Railway Association Signal Section in 1915 where multiple red aspects are most common.
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equipment: Electrified, LZB signalling, "Zugfunk" radio, GSM-R, BOS-Funk, C-Netz (from 1992 to 2000), GSM900/1800 (T-mobile, Vodafone and Eplus since the middle of 2006), FM radio, wind direction measuring system, two emergency exits)
Oswald Stevens Nock (1905–1994), nicknamed Ossie, was a British railway signal engineer and senior manager at the Westinghouse company; he is well known for his prodigious output of popularist publications on railway subjects, including over 100 books, as well as a large number of more technical works on locomotive performance.
They were promoted by the railway engineer J. P. Knight and constructed by the railway signal engineers of Saxby & Farmer.