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The greens are set to overlap for 12 seconds during each 75 second cycle of the light between the hours of 7:00 a.m. and 10 a.m. This overlap is necessary to prevent traffic during this time of day from backing up onto I-285. . Removing the overlap and allowing the traffic to back up onto I-285 creates a serious safety concern due to the potential for high-speed traffic mixing with traffic that is stopped