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Debra Bloom, P.E. City of Roseville .lanuary 15, 2008 Page 21 The McGough proposed Iona Lane connection is not in compliance with the previously planned Twin Lakes AUAR internal roadway configuration, nor is it in compliance with the access spacing guidelines of Ramsey County (full-access intersection spacing with traffic signal control), Therefore, this connection was not included in arty of the three roadway confgurations previously discussed. Based on discussions with City staff, one additional development was assumed constructed {Cleveland Avenue Hotel) under year 2011 conditions. This adjacent development is located in subarea I, block 3b. Under year 201b canditioars, multiple adjacent developments were assumed constructed in subarea I, blacks la, 3a and 4. Refer to 1~igure 3 for subarea and block locations for each development. The trips generated by these developments were included in the year 2011 and 2016 build traffic forecasts and analysis. Under year 2011 build conditions, four out of seven key intersections will continue to operate at an acceptable overall LOS D or better during the a.m. and p.m. peak flours with existing traffic controls, geometric layout and internal roadway configuration 1. Queues associated with the poor operations at the intersection of County Raad C/Prior Avenue will impact the internal intersection of Twin Lakes Parkway/Prior Avenue. o The following roadway improvements are recommended to improve the poor operations: Cleveland Avenue at County Road C • Construct a dedicated westbound right-turn lane (with turn lane storage) County Road C at Prior Avenue • Construct Prior Avenue as two lanes southbound into County Road C and one lane northbound into Twin Lakes Parkway • Install a traffic signal All Signalized Intersections • Optimize signal timing With the recommended roadway improvements, all key intersections will operate at an acceptable overall LOS D or better. However, motorists on the side-street approach of County Road C2 at Cleveland Avenue will experience heavy delays during the p.m. peak hour. In addition, the roundabouts on the new Twin Lakes Parkway will operate acceptably. Under year 2016 build conditions, all key intersections will continue to operate at an acceptable overall LOS D or better during the a.m. peak hour with the recommended year 2011 roadway improvements and inte~•nai roadway configuration 1. However, only one out of seven key intersections will operate acceptably during the p.m. peak hour, with the recommended year 2011 roadway improvements and internal roadway configuration 1. Minor roadway improvements will not have a great enough impact on tlae intersection operations for all to operate acceptably. Therefore, internal roadway configuration 1 is not a feasible option under year 2016 build conditions.