Meaning of block post | Babel Free

Definitions

In signalling, a signal box at one end of a block section.

Examples

“There is a very small illuminated diagram, of comparatively recent installation, and this probably is unique in a four-lever block⟳ post⟳. […] There are, of course, small block⟳ posts elsewhere that have⟳ no switch⟳ but they control⟳ special installations, such as level crossings.”

“As the new year dawned, Network Rail operated 562 SBs [signal boxes] of all shapes and sizes. The majority (473) are block⟳ posts, which carry⟳ out the primary role of signalling trains. [...] While most block⟳ posts often also control⟳ level crossings, crossing boxes are dedicated to crossing control⟳. [...] Swing⟳ bridge boxes are an interesting category. Some, such as Trowse Swing⟳ Bridge in Norfolk, combine⟳ the role of block⟳ post⟳ with supervising level crossings and operating a swing⟳ bridge. [...] In common with crossing boxes, swing⟳ bridge boxes carry⟳ out their role under the supervision of a block⟳ post⟳. For example, Keadby Canal SB needs to communicate with Scunthorpe PSB. When the resignalling of the Lowestoft line is completed, Reedham and Somerleyton Swing⟳ Bridges will no longer be block⟳ posts. [...] Records suggest⟳ that 100 years ago, there were around 12,000 block⟳ posts.”

CEFR level