Tucson, AZ

The City of Tucson, Arizona, was the only agency to implement and then discontinue use of the flashing yellow arrow display. The City implemented flashing yellow arrow on May 30, 2001 at two intersections, replacing PPLT displays with a five-section vertical display face. The City of Tucson used the flashing yellow arrow for their right-turn overlaps for over ten years without any problems. Within one week of implementation of the flashing yellow arrow, there was a crash at one of the study intersections. The city manager directed the city traffic engineer to rescind participation in the implementation study. The flashing yellow arrow was not reported to be directly linked to the cause of the crash. Based on feedback from the operations engineer, the intersection operations performed well during the time that the flashing yellow arrow display was in effect. The flashing yellow arrow display continues to be used for the right-turn overlap movements, as it has for approximately ten years.

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