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September 11, 2021 <br />Page 42 <br />New River Crossing <br />The new river crossing alignment chosen for concept development connects Highway 10 at the <br />Armstrong Boulevard interchange and I-94 at the Dayton Parkway interchange by way of Zanzibar <br />Lane. This alignment necessitates about six miles of new roadway including the construction of a <br />bridge in each direction over the Mississippi River. It assumes six major intersections along the <br />corridor. A small box culvert is assumed over Diamond Creek and a pedestrian underpass to <br />connect proposed commercial development in the north section of the project. Based on traffic <br />analysis, two typical section concepts were chosen for this roadway called New River Crossing — Al <br />and New River Crossing — A2. <br />New River Crossing Capacity <br />A variety of facility types were evaluated for the new river crossing concept, including an arterial, <br />expressway, and freeway. This evaluation centered on comparisons of projected 2040 traffic <br />volumes to planning level facility capacities. Figure 23 shows the projected volume -to -capacity ratios <br />for a two-lane arterial, a four -lane arterial, a four -lane expressway, and a four -lane freeway facility <br />type. On the basis of this analysis, the project team eliminated a two-lane arterial facility (over <br />capacity) and a four -lane freeway facility (significantly under capacity) from further consideration. <br />Figure 23: Planning -Level Capacity Needs for New River Crossing <br />1.20 <br />1.00 <br />0 <br />li <br />0.80 <br />0.60 <br />0 <br />a.� <br />0.40 <br />0 <br />0.20 <br />0.00 <br />2-Lane <br />Arterial <br />4-Lane <br />Arterial <br />Over Capacity 1\ <br />Approaching capacity <br />4, Under Capacity <br />4-Lane <br />Expressway <br />4-Lane <br />Freeway <br />0 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 90,000 <br />Roadway Planning Capacity (vehicles per day) <br />New River Crossing - Al <br />New river crossing — Al includes the construction of a 4four-lane urban divided arterial roadway <br />along the proposed alignment. right-of-way needs were assumed to be 120-foot' wide to account for <br />possible trails on each side and room for utilities. Low and high costs differ based on material and <br />land cost ranges. The roadway itself was assumed to have a 45—mph speed limit and meet MnDOT <br />standards shown in the figure below. Intersections along the arterial roadway were assumed to be <br />spaced a minimum of one -quarter mile apart. Example intersection types include restricted crossing <br />U-Turn intersections (RCUTs), traffic signalized intersections, side road stop intersections, Green-T <br />intersections, or roundabouts. <br />Northwest Metro Mississippi River Crossing Feasibility Analysis <br />