Assertion: traffic light | /r/HasProperty | necessary
Facets:
value: for motorized traffic
type: TRANSITIVE-OBJECT
Source sentences:
text: It explains why the traffic light is necessary and who is at danger without one.
text: Then traffic engineers follow specific, uniform guidelines to determine whether a traffic signal is necessary.
text: The traffic lights subsequently don't switch to green and there are no unnecessary waiting times for motorized traffic.