SSP056 Iss 1
Control of Trailing Connection Worked by Intermediate Ground Frame: Released from the Signal Box in Rear: Absolute Block Line
A Ground Frame contains a lever or an assembly of levers (in certain cases a small switch panel) to provide the means for the local operation of connections in the running lines. When the connection provides access to sidings it will be necessary to provide facilities for shutting a train in the siding to permit other trains to pass on the running line.
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