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Memorandum to Dennis Trooien, Dennis Properties Subject: Traffic and Parking Study for Proposed Redevelopment of Arden Plaza Page 7 of 15 September 17, 2007 all four scenarios if the following two measures were implemented: a) increase green time for eastbound left turns by reducing green time for the westbound through movements, without changing the cycle length or any other signal coordination parameters, and b) provide protected/permissive phasing for all left turn movements at the intersection. It is important to note that the need for these mitigation measures already exists and the proposed development will not significantly alter that need. . County Road E/site access. Motorists exiting the Arden Plaza development via the driveway on County Road E presently experience LOS F. Exiting movements will continue to experience LOS F at both driveways upon completion of the proposed redevelopment. Delay values for all movements under all scenarios are presented in the Synchro worksheets, which are included in the appendix. The capacity analyses revealed two principal reasons for the LOS F operation at this intersection: a) insufficient gaps on the mainline due to high through traffic volumes on County Road E and b) short storage for exiting right turns. No feasible mitigation measures are available for the driveway intersections that would improve the availability of gaps on the mainline for exiting motorists. However, the storage lengths for right turns can be lengthened. Based on the results of the capacity analyses, we recommend that the storage length for exiting right turns on the driveway on County Road E be extended to the south edge of the retail building A (pharmacy), which will provide a total storage length of about] 90 feel. This change will significantly reduce the average delay for exiting movements. To make it easy to understand for exiting motorists and thereby, provide efficient operations, we recommend that a stop sign and a lane assignment sign be provided on the driveway approach to County Road E. The signing should be installed per standards presented in the Minnesota Manual on Uniform Traffic Control Devices. . Lexington A venue/site access. Motorists exiting the Arden Plaza development via the driveway on Lexington A venue presently experience LOS F. Exiting movements will continue to experience LOS F at both driveways upon completion of the proposed redevelopment. Delay values for all movements under all scenarios are presented in the Synchro worksheets, which are included in the appendix_ The capacity analyses revealed two principal reasons for the LOS F operation at this intersection: a) insufficient gaps on the mainline due to high through traffic volumes on Lexington A venue and b) short storage for exiting right turns. No feasible mitigation measures are available for the driveway intersections that would improve the availability of gaps on the mainline for exiting motorists. However, the storage lengths for right turns can be lengthened.