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<br />. <br /> <br />HIGHWAY SYSTEM DEFICIENCIES <br /> <br />Three types of deficiencies are included in the analysis: <br /> <br />1. Traffic volumes in excess of capacity <br />2. Weaving movements in excess of capacity <br />3. Intersection volumes in excess of capacity <br /> <br />Freeway operations analysis was not conducted as part of this study. The identification if <br />congested segments was based on review of volumes and forecast-model-based <br />capacities. <br /> <br />The MnDOT/Metropolitan Council regional travel demand model was used to assess the <br />impacts of future land use and transportation configurations. This analysis uses a version <br />of the regional model as modified for the North Metro 1-35W Coalition as part of the <br />Coalition's Buildout Development Study conducted in early 2001 (initial analysis of 1- <br />35W was conducted by SRF in June 2001 using the regional model). <br /> <br />Traffic Volumes in Excess of Capacity <br /> <br />. <br /> <br />Existing deficiencies in the regional highway system were identified based on review of <br />published loop detector data (October, 2000) and traffic count data collected by SRF in <br />June 2001. <br /> <br />Several segments of regional highways in the study area currently experience volume- <br />based congestion. "Unacceptable" is defined as peak-hour volumes excceding 110 <br />percent of the level of service D capacity, or approximately 2200 vehicles per lane per <br />hour depending 011 whether auxiliary lanes are present in the roadway segment. This <br />generally would equate to slow-and-go traffic bordering on stop-and-go traffic (LOS <br />Elf). It should be noted that this type of analysis does not reflect the "bottleneck" effect <br />of congestion where traffic queues propagate upstream from a congested point. <br /> <br />Table 2 identifies the location of segments considered to have unacceptable congestion <br />under the various alternatives. Very large volume-to-capacity (VIC) ratios (greater than <br />1.35) represent a potentially unrealistic condition that may be beyond the capabilities of <br />the regional forecast model to adequately model; these segments could be expected to <br />experience congestion four or more hours per day compared to one or two hours for VIC <br />ratios of approximately 1.0-1.2 VlC. Detailed existing and forecast volume estimates for <br />the alternatives considered are included in the appendix. <br /> <br />. <br /> <br />1-35W/I-694ITH 10ITH 36 <br />Transportation Deficiency Study <br /> <br />-12- <br /> <br />SRF Consulting Group. Inc. <br />July 2002 <br />