Fog Repeater Signal
Fog Repeater Signal FR132 on platform 2 at North Weald Station on the heritage Epping Ongar Railway (EOR) in Essex (UK).
Fog repeater signals which have similar operating principles to banner repeaters on Network Rail are extensively used on the London Underground network to forewarn {or repeat) a driver of a forthcoming signal aspect.
As the name suggests these were originally designed for use in poor visibility, however they are now used to warn the driver of the forthcoming aspect when the actual signal is obscured or out of sight due to platform buildings, a curved tunnel etc.
In this case the repeater is for signal NW132 at the eastern end of platform 2.
This London 'Underground' fog repeater is a legacy of when North Weald Station was on the Central (tube) line from 1949 to 1994.
Fog Repeater Signal
Fog Repeater Signal FR132 on platform 2 at North Weald Station on the heritage Epping Ongar Railway (EOR) in Essex (UK).
Fog repeater signals which have similar operating principles to banner repeaters on Network Rail are extensively used on the London Underground network to forewarn {or repeat) a driver of a forthcoming signal aspect.
As the name suggests these were originally designed for use in poor visibility, however they are now used to warn the driver of the forthcoming aspect when the actual signal is obscured or out of sight due to platform buildings, a curved tunnel etc.
In this case the repeater is for signal NW132 at the eastern end of platform 2.
This London 'Underground' fog repeater is a legacy of when North Weald Station was on the Central (tube) line from 1949 to 1994.