Jackson County, OR

The County implemented the flashing yellow arrow with minimal trouble using the command box feature of the Wapiti local controller firmware. The County did express concern over what the flashing yellow arrow display does during emergency vehicle preempt from the opposite direction. The command box logic could be configured such that the flashing yellow arrow display would go dark when opposing emergency vehicle preemption was detected.

Intersection Management
Traffic control is managed with Type 170E controllers, with Wapiti firmware. Special logic was developed through the command box feature. 

Jackson County is the only implementing agency to implement the flashing yellow arrow with a red arrow clearance between the yellow clearance arrow and the onset of the flashing yellow arrow display.

Reported problems
The County has received very positive responses from the community and local law agencies to both the 4-section and 3-section flashing yellow arrow display. The local police department has a public information section in the local newspaper called “Cops Corner.” One particular issue of Cops Corner was about the flashing yellow arrow installation. Local law enforcement supported the flashing yellow arrow use.  Subsequently, local citizens wrote in to the County Traffic Engineer. All responses were in support of the flashing yellow arrow.

Beaverton, OR

Intersection Traffic Management
Traffic control is managed with Type 170E controllers, with Wapiti firmware. Special logic was developed through the command box feature (unique to Wapiti firmware). Special attention was needed in the development of the command box string for emergency vehicle preemption operation.

Reported Problems
The City of Beaverton did not receive many calls, e-mails, or letters in response to the flashing yellow arrow implementations.