The orderly presentation needed to let people comfortably and succesfully navigate in an environment. Signage is just one tool used to communicate that information.
A command and control system in which transit units (cars or trains) are controlled by electronic or mechanical devices along the track or other guideway. (TRB)
Train control or movement apparatus which is located along the track or wayside as opposed to the control center or other remote location. (NTSC)
Safety/security system on the Green Line detecting unauthorized intrusion into the right-of-way.
A device for selecting rail vehicle routes.
Operating instructions issued by the Central Control Facility (CCF) to rail personnel advising of conditions affecting normal rail operations.
In rail operations, a fixed signal that is located along the track right-of-way. (TRB)
A mechanical arm located on the wayside which, when in the up (trip) position, initiates an emergency brake application on a train which passes it. (NTSC)