Abstract: A convection cooled traffic control device for selectively indicating traffic control guidance to vehicles. An enhanced brightness traffic control device for selectively displaying patterns of light emitting diodes (LEDs). A convection cooled traffic control device for selectively directing traffic by selectively actuating patterns of LEDs. A tapering system of a LED traffic control device. A brightness regulated LED traffic signal lamp. A conflict monitor interface system for a LED signal lamp. A failure logging method for compiling LED failures within an LED traffic signal light.
Type:
Grant
Filed:
May 12, 2004
Date of Patent:
September 25, 2007
Assignee:
USA Signal Technology, LLC
Inventors:
Bob Stevenson, Paul Calixto, Henry Lee, Edson Calixto, Jorge Santana, Ralph Ferguson