detectors
point lock
iock bar
stretcher bar
in the middle of the track a little in front of the toes of the tongue rail
near and parallel to inner side of one of the rails
at right angle to the rail
near and parallel to inner side of both the rails
to ensure that each switch is correctly set
to ensure that the point may not be operated while the train is on it
to detect any obstruction between and tongue rail
none of the above
triangle
turntable
traverser
scotch block
changing the direction of engine
transferring wagons to and from parallel tracks without shunting
separating all the sidings and shunting lines from main lines
preventing the vehicles from running off the track