published by HerMajesty's Stationery Office). 1963 [25 November 2006]. (原始内容存档于2006-10-26). Did Dr Beeching get it wrong with his railway cuts 50 years
号舱(一些铁路,如大中央铁路(英语:Great Central Railway))。目前,这些分散的系统正在被整合成大规模的信号中心或调度室。1843年,伦敦和克罗伊登铁路公司(英语:London and Croydon Railway)首次使用信号箱。 Turner, J. T. Howard London
使用|accessdate=需要含有|url= (帮助) The Development and Principles of UK Signalling. Railway Technical. [October 21, 2014]. (原始内容存档于October 21, 2014). BO23 Brochure
AREMA(英语:American Railway Engineering and Maintenance-of-Way Association) FRA HMRI(英语:HerMajesty'sRailwayInspectorate) IRSE(英语:Institution of Railway Signal Engineers)