Railway signalling

optical, acoustic or electronic signal providing information about the state of a railway line

system with signals used to control railway traffic

chacma baboon, d. 1890

technical system of the railway

railway traffic management system planned by the European Commission

rail transport profession

person who controls the passage of a train by a level crossing

railway safety system

type of mechanical railway signal

occurs when a train passes a stop signal without authority to do so

Train protection system for rapid transit railways

SelTrac is a digital railway signalling technology used to automatically control the movements of rail vehicles. It was the first fully automatic moving-block signalling system to be commercially implemented.