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<br />CHAPTER 8: SHORT-TERM TRAFFIC OPERATIONAL <br />IMPROVEMENTS <br />This chapter provides an analysis of short-term intersection improvements based on future (2013) <br />conditions at the study intersections. The purpose of this chapter is to determine short-term improvements <br />th <br />that could be considered for the West 11 Avenue corridor. Future traffic volumes were determined based <br />on traffic forecasts from Lane Council of Governments. <br />th <br />Improvements to the intersections along West 11 Avenue were based on the existing and future traffic <br />operations along the corridor. In the existing conditions (see Chapter 3), four study intersections do not <br />meet the mobility standards established by the City and State. These intersections are listed below: <br />AM Peak Hour <br />th <br /> West 11 Avenue/Danebo Avenue-Willow Creek Road (v/c = 0.91) <br />PM Peak Hour <br />th <br /> West 11 Avenue/Green Hill Road (v/c = 0.85) <br />th <br /> West 11 Avenue/Terry Street (v/c = 0.96) <br />th <br /> West 11 Avenue/Beltline Road (v/c = 0.99) <br />Future 2013 operating conditions were also analyzed to determine if any other intersection are expected to <br />exceed operating standards in the near future. The future conditions analysis and recommended <br />intersection improvements are described next. <br />Future (2013) Conditions <br />Future (2013) AM and PM peak hour turning movement volumes were estimated for the study area <br />intersections using the travel demand model developed by Lane Council of Governments (LCOG). The <br />future (2013) volumes were estimated by a post-processing methodology that included estimating the <br />growth increment between the base year and the future year models for each intersection approach and <br />applying an interpolated growth factor to the existing year turn movement volumes. City staff also <br />provided trip information for planned but unconstructed developments along the corridor that were <br />29 <br />estimated to generate peak hour traffic but was not included in the traffic counts. The projected future <br />(2013) traffic volumes are shown in Figure 8-1. <br />The future (2013) operation performance of the study intersections was performed using Synchro software. <br />Synchro employs methodology from the 2000 Highway Capacity Manual. The traffic volumes and <br />transportation system configurations described previously were used to determine intersection levels of <br />service (LOS) and volume-to-capacity ratios. The existing intersection signal timing was used in the future <br />(2013) analysis. The resulting operations analysis is presented in Table 8-1. Appendix D provides the LOS <br />worksheets for each intersection. <br /> <br />29 <br /> In process traffic volume figures provided by Gary McNeel <br /> <br /> <br />th <br />West 11 Avenue Corridor Study September 4, 2009 <br />City of Eugene P07265-003-000 <br />58 <br />