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DRAFT November 21, 1995 district definitely has a potential for congestion, even though the • ultimate travel demand forecast only identifies the small segment between T.H. 10 and the river bridge as being deficient. This type of area is very difficult to model accurately because streets in the network come close together and the assignment cannot possibly take into account all the factors that influence a driver's route selection when several of equal attractiveness are available. It is reasonable to assume that the segment between T.H. 10 and the river bridge could become a significant problem area, with the forecasted traffic volumes on T.H. 10 and the rapid growth of Otsego. The river bridge intersection is too close to the T.H. 10 intersection to install a separate traffic signal. The best solution might be to introduce turn prohibitions, particularly for the westbound to southbound left turn. At some point, it might be necessary to replace existing on-street diagonal parking with parallel parking and additional off-street parking. b. Roadway Additions Additions to the roadway network had to satisfy several criteria: 1. They could not damage the urban fabric. Elk River has • many well established neighborhoods and parklands, and a commitment was made to find solutions to transportation system inadequacies without showing roads cutting new swaths through existing neighborhoods. However, existing local street rights-of-way were considered eligible for incorporation into the system of arterials or collectors, as necessary. 2. They had to take traffic off those roadway segments that had been identified as deficient in the ultimate travel demand forecast. In areas where no deficiency was identified, roadway additions were not shown unless they provided a significant positive impact on deficient areas elsewhere in the system. As development occurs in these areas, it will be necessary to add collectors to the system. This is especially true of the northern part of the City, where arterials are spaced further apart. However, it is beyond the scope of this study to recommend locations for new residential collectors in areas not yet developing. As development plans are submitted to the City, the review process should include referring to a functional classification characteristics • chart such as Table 4 to ensure that collectors are added to the system at property spacing, in such a way as to promote their intended use. CTP-230.156 -14- 230-156-80