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Talk:List of signal boxes

424 bytes added, 18:56, 14 December 2015
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::: It would have been a legal requirement on point distances. The evolution of the legal requirements for facing points is 1874 120 yds, 1877 150 yds, 1885 180 yds, 1900 200 yds, 1908 250 yds, 1925 350 yds. Of course, motor points would have been exempt from these requirements, and the points at Berrington and Cressage would have eventually come within the legal maximum distance at later dates. You're quite right that "SB" can indicate things such as a ground frame or level crossing, I suspect that this was due to the OS mappers not being railway railway experts, and applying a much broader "SB" definition to keep things simple! I'd be interested to know which OS map Mitchell and Smith used, as none of the ones I've seen include "SB" at either end. --[[User:Danny252|Danny252]] ([[User talk:Danny252|talk]]) 12:43, 14 December 2015 (UTC)
 
:::Their commentary refers to "the 1902 survey". However it's not on the georeferenced map 6in version which was revised 1901 and published 1903. On looking further, the other SB is actually by the crossing in the middle of the loop leading into the cattle pen rather than at the furthest end of the loop, so it may be a complete red herring.--[[User:Robin|Robin]] ([[User talk:Robin|talk]]) 18:56, 14 December 2015 (UTC)
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