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Memorandum June 18, 1996 Page 2 The proximity of the two signalized intersections on Cleveland A venue combined with the traffic volumes experienced in the area creates potential overlap and conflicts between the two intersection operations such as queuing and signal timing. Traffic flow improvements being evaluated include modifying the interchange connection geometry onto Cleveland Avenue north including alternate locations, eliminating the exit loop to County Road C, modifications to Cleveland A venue to better accommodate the interchange and access control for Cleveland Avenue and County Road C. 2) The exit loop from 1-35W northbound to County Road C westbound requires the driver to make a decision too early after exiting the freeway mainline and is located in a tight curve further complicating the decision process. The existing loop is not a standard design and therefore confusing to unfamiliar drivers. The existing loop also creates a traffic merging situation on County Road C which is an outdated design that creates confusion for drivers on "City" streets. 3) The reconfiguration of the interchange onto Cleveland Avenue should not markedly change the general traffic patterns in the area. The proposed Twin Lakes Park-way is anticipated to carry mainly development generated traffic although the ultimate design and configuration of roadways within Twin Lakes may alter the local traffic patterns. Modifications to Cleveland A venue including \\idening, adding turn lanes and channelization between County Road C-2 and County Road C are being evaluated for improving traffic flow and safety in the interchange area. 4) The majority of land west of Cleveland between County Road C and the Centre Pointe Development is classified as wetland. The area north of the current exit and entrance ramps is classified as DNR wetland #50- W. Based on prelim~ary review of the area, wetland impacts would need to be mitigated on a 2: I basis. 5) Jay Kennedy indicated that the Rice Creek Watershed would probably require a storm water treatment pond for runoff entering the wetland area. BRW \\ill investigate this further. Storm water ponding for the interchange area should be combined with ponding needed for the redevelopment area as much as possible. BRW "ill conduct further discussions with the watershed, DNR and Corps of Engineers regarding ponding and wetland mitigation. III. Twin Lakes Redevelopment Area I) Arijs Pakalns described four alternatives for the T\\1n Lakes Park'way alignment and roadways within the redevelopment area. The preferred alternative by City staff included Twin Lakes Park-way running. along the existing MCES sanitary sewer alignment between Arthur Street and Cleveland A venue. The second choice alternative included Twin Lakes Park"way intersecting Cleveland A venue north of the existing Cummings Property, running east 500 feet then north to the sanitary sewer easement then tw11ing east towards Arthur Street. BRW will investigate the costs and issues associated with the two alternatives and the corresponding interchange reconfiguration associated \\ith each alternative to assist the City in deciding on a fmal alternative.