adlingr wrote:I have done some research on Surbiton NX panel signal box in Surrey, as there is currently little or no information,
there is not even an external picture of the panel box that I can find on the internet.
adlingr wrote:Hi John
Thanks for the link, Ive ordered some hi res pictures, thanks that will help my CAD drawings a bit more.
out of curosity, do you know why internet search engines like google were unable to find and references to your pictures on your site.
I looked for meta data on the surbiton pages and think the meta date is missisng. ???
DY444 wrote:I think there's some confusion here. The main line signals were placed to provide braking distance from 90mph however extra "closing up" signals were provided on the slow lines at various locations (mostly just before the platforms at stations). To avoid potential misreads extra signals were also provided on the fast lines at the same places. These extra fast line signals were the ones which did not provide adequate braking distance at 90 mph and had the special controls. You can identify them on the diagrams produced by marka as they don't have train describer berths
The fast line additional signals were 3 aspect (Y/G/Y) and had the same signal number as the "normal" signal ahead but with a D prefix if the signal ahead was controlled and a DWA prefix if the signal ahead was an auto. My (evidently unreliable) memory is that these showed the same proceed aspect as the "normal" signal ahead or yellow if the signal ahead was at danger, and in the latter case the signal in rear would show yellow also.
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