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I-5/Willamette River Crossing Project #: 7068
<br />October 14, 2005 Page 4
<br />In addition, when compared to the no build, any of the considered modifications to the Franklin
<br />and Glenwood Boulevard interchanges would not create the need to change the number of travel
<br />lanes provided at any of the locations beyond what is forecast in the existing LCOG fiscally
<br />constrained scenario. The only exception to this is Glenwood south of Franklin. If a split
<br />diamond option were pursued in which Glenwood was used as the connection between the two
<br />interchanges (in lieu of frontage roads), Glenwood may need to be widened to a five-lane
<br />facility.
<br />Interchange Comparisons
<br />A comparison of the daily traffic volume forecasts at each of the interchanges is shown in Table
<br />2.
<br />Table 2 Approximate Interchange Traffic Volumes (vehicles per day)
<br />LocationYear 2025
<br />Category
<br />Year 2002 Comment
<br />No Build Category 1 Category 2 3A Category 3B
<br />Franklin Boulevard Interchange
<br />NB Off 4,500 – 5,000 – 5,500 – 6,500 – N/A N/A Ramp terminals
<br />5,5006,0006,5007,500may require two
<br />lanes
<br />NB On N/A N/A 10,000 – 10,500 – 11,000 – 11,000 – Two-lane on-
<br />11,00011,50012,00012,000ramp?
<br />SB Off N/A N/A 8,000 – 10,000 – 11,000 – 11,500 – Ramp terminal
<br />9,00011,00012,00012,500may require two
<br />or three lanes
<br />SB On 4,500 - 5,500 – 5,500 – 6,500 – N/A N/A One-lane on-
<br />5,5006,5006,5007,500ramp
<br />Glenwood Boulevard Interchange
<br />NB Off 1,000 – 2,500 – 3,500 – 3,500 – 7,500 – 9,000 – Split
<br />1,5003,5004,5004,5008,50010,000configuration
<br />may require two
<br />lanes at ramp
<br />terminal
<br />NB On 4,000 – 6,000 – 2,000 – 3,000 – N/A N/A One-lane on-
<br />5,0007,0003,0004,000ramp
<br />SB Off 5,500 – 9,500 – 8,000 – 9,000 – N/A N/A Two-lane ramp
<br />6,50010,5009,00010,000terminal
<br />SB On < 1,000 3,000 – 3,500 – 3,500 – 5,500 – 7,000 – One-lane on-
<br />4,0004,5004,5006,5008,000ramp
<br />Note: Category 1 = full interchange at Franklin; Category 2 = new ramps to/from the north at Franklin; Category 3A = split
<br />configuration using Franklin and Glenwood to connect the two interchanges; Category 3B = split configuration using frontage roads
<br />along I-5
<br />As shown in Table 2, new ramps at Franklin to/from the north could carry between 8,000 –
<br />12,000 vehicles per day, depending on the interchange category considered. This level of volume
<br />in combination with the through volume on Franklin would require turn lanes for all directions
<br />and in some cases might warrant a dual left-turn or dual right-turn lane.
<br />Kittelson & Associates, Inc. Portland, Oregon
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