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SEH MEMORANDUM TO: Bob Moberg, PE, Project Manager FROM: Heather Kienitz, PE, Transportation Engineer DATE: February 11, 2004 RE: City of Lino Lakes Legacy at Woods Edge — Traffic Operations Analysis SEH No. A- LINOL0304.00 14.00 Traffic operations were evaluated at three intersections along CSAH 23 (Lake Drive) in the City of Lino Lakes. The evaluation was conducted to learn the operational impacts of the Legacy at Woods Edge development and the proposed roadway improvements. The three intersections reviewed include: • Lake Drive and Southbound I -35W Ramps • Lake Drive and Northbound I -35W Ramps • Lake Drive and Town Center Parkway These intersections were modeled using traffic simulation software to determine traffic operations under the existing and proposed geometrics and intersection control. The proposed improvements used for --the analysis are shown on the preliminary plat that was submitted to the City in December 2003. These improvements are considered to be interim until the Lake Drive bridge over I -35W can be replaced. PM peak hour traffic volumes were used in the analysis because this hour experiences the highest traffic volumes in the existing and forecast years. As part of the approval process on this project, Mn/DOT required four sets of analyses: Existing 2003 — Analysis of the existing geometrics, intersection control and traffic volumes was used to establish baseline traffic operations. • 2005 No -Build — Analysis of the existing geometrics and intersection control was conducted with 2005 forecast traffic volumes including full build -out of the development to determine traffic operations at the year of opening if no improvements were made to the existing system. • 2005 Build Analysis of the proposed geometrics, intersection control and 2005 forecast traffic volumes including full build -out of the development was conducted to determine traffic operations at the year of opening. • 2010 Build — A "horizon year" analysis was required to determine the year at which the proposed geometric and intersection control improvements would fail. Mn/DOT staff typically requires a 20 -year forecast for the horizon year analysis. In this case, during discussions with Mn/DOT staff it was agreed that a "failure date" would likely occur prior to a 20 -year timeframe due to the capacity constraints presented by the existing Lake Drive bridge over I -35W, as well as those on mainline I -35W itself. Short Elliott Hendrickson Inc., 3535 Vadnais Center Drive, St. Paul, MN 55110 -5196 SEH is an equal opportunity employer 1 www.sehinc.com f 651.490.2000 1 800.325.2055 1 651.490.2150 fax