Assertion: signal | /r/HasProperty | mounted on post
Facets:
value: over the tracks
type: LOCATION
value: normally
type: DEGREE
Source sentences:
text: When a single track is involved, the signal is normally mounted on a post or mast which displays the arm or signal head at some height above the track, in order to allow it to be seen at a distance.
text: This consists of a platform extending over the tracks; the signals are mounted on this platform over the tracks they control.