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0 <br /> -Mr.Bruce Westby,PE <br /> December 16,2016 <br /> Page 2 <br /> turn phasing(left turns allowed on green arrow only)for all intersection approaches. In order to provide more <br /> efficient operations for these left turning movements(especially during non-peak traffic periods),the City is <br /> interested in considering modifications to this signal system to incorporate flashing yellow arrow operations on a <br /> time of day basis. The implementation of flashing yellow arrow operations generally allows for greater flexibility in <br /> how the left turn movements are operated throughout the day. <br /> In order to analyze the potential for utilizing flashing yellow arrow operations,the City has requested that a qualified <br /> signal design consultant complete a comprehensive review of the signal system. This will help to determine if the <br /> signal system and corresponding left turn movements should be retrofitted with flashing yellow arrow operations or <br /> if the signal system should not be modified due to operational,geometric,or safety concerns(such as sight distance <br /> issues,crash history,intersection geometries,etc.). <br /> Items recommended to be considered in this analysis include: <br /> • Review of intersection signal components(controller and cabinet equipment,signal head placement, <br /> vehicular detection,etc.)to determine what components will require upgrading to allow for flashing yellow <br /> arrow operations. <br /> • Review of intersection geometries to determine if there are conditions(such as dual left turn movements at <br /> highly traveled intersections,sight distance concerns,lack of dedicated left turn lanes, etc.)that might <br /> preclude the upgrading to flashing yellow arrow operations. <br /> • Review of recent crash history at this intersection to determine if there are right angle crash histories that <br /> may preclude changes to the operation of the signal system. <br /> ■ Review of recent traffic approach volumes to determine limitations of flashing yellow arrow operations and <br /> time of day operations. <br /> SEH has previously completed analysis of flashing yellow arrow operations at several locations and has provided <br /> agencies such as the Anoka County Highway Department with a detailed memorandum listing criteria for <br /> consideration of flashing yellow arrow operations. These criteria are based on current State standards and guidelines <br /> along with consideration of specific intersection issues. <br /> SEH will provide the City of Ramsey with analysis and review services needed for the City to be able to consider <br /> budgeting and scheduling for future flashing yellow arrow upgrades to this signal system. The City and County will <br /> be included in the ongoing analysis to ensure that the City and County are in agreement with this analysis and are <br /> able to provide input into proposed future budgeting and implementation recommendations. <br /> Scope of Work <br /> Field Review of Intersection <br /> Using existing signal plans to be provided by the City or County, SEH will perform a brief site visit of this signal <br /> system to determine existing signal components,controller and cabinet capabilities,requirements for signal <br /> construction work needed to upgrade each left turn movement to FYA operations,and overall limitations on being <br /> able to implement FYA operations for any applicable intersection movement. <br />