About: http://webisa.webdatacommons.org/93775698

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In this embodiment the emitter has a keypad, joystick, toggle switch or other input device which the authorized person uses to select traffic signal phases.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com