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Johnsonville Signalling Changes in the signalling arrangements at Johnsonville, from mechanical signalling in 1917 to the present day.
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Johnsonville S & I Right Johnsonville 4L Down Departure with 4R Up Home in the background. |
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1917
Signals |
Engine Whistles |
1938
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Motor points and colour light signals were installed at Johnsonville in December 1937. Tablet remained in operation until the third of July 1938 when it was cancelled. The full Wellington - Johnsonville automatic signalling came into operation on the fourth of July 1938. |
On the eastern side of the relay cabin a metal door gives access to an illuminated diagram. On the diagram, associated with each signal, is a push-button. The operation of a push-button causes the correct route to be set up and the signal to clear. A blue light on the diagram indicates thus: steady - route may be selected; flashing - route cancelled, push buttons ineffective; out - signal cleared. |
1960
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Platform 1 removed. |
Illuminated diagram as in 1938. |
June 1969
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Double slip and south backshunt removed. |
Illuminated diagram as in 1938. |
July 1969
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Motor points replaced by handlever and switchlock. |
"L" light removed from Up Home signal. |
1998
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Pilot keys removed by this date (they were shown on a 1985 S & I diagram). The 1938 diagram did not show pilot keys. |
In 1977 distances had been metricated. In about 1983 the branch had been shortened to free up land for a supermarket. |
Last Updated: Sunday, August 07, 2005