Assertion: pedestrian | /r/CapableOf | activate the system
Facets:
value: by pressing a button
type: MANNER
Source sentences:
text: As shown in Figure 3 below, the signal face for drivers remains unlit or "dark" until the pedestrian activates the system.
text: When a pedestrian activates the system by pressing a button, overhead flashing yellow lights alert drivers that pedestrians have activated the signal.
text: Installed on roadside poles, the RRFB remains dark until a pedestrian activates the system by pressing a push button.