Approaching a junction and need to know whether it39s safe to turn off or continue up the mainline it sounds like you need a junction home signal this hornby track accessory r169 is positioned just before a point switch on the track and signals to the train driver which route to take the taller signal in this instance refers to the mainline whereas the shorter signal represents the branch place it at the edge of your hornby layout and operate it by hand to clear up any confusion about