A light that is common to both On and Off Aspects of a Position Light
SignalA visual display device which conveys instructions or provides prior warning of instructions regarding the driver’s authority to proceed. More, or the common lamp of a PLJIAbbreviated term for Position Light Junction Indicator. More where more than one diverging
RouteThe path along a section of track between one Signal and the next, along which an authorised movement is to be made. More exists.