(A) To forecast future conditions in the year 2030, a growth rate was applied to the existing 30 HV in 2008. This growth rate was calculated using ODOT’s 2026 Highway Future Volume Table, (2026 Highway Future Volume Table, Oregon Department of Transportation, obtained July 2008 at http://www.oregon.gov/ ODOT/TD/TP/TAD R.shtml) which provides base year average daily traffic volumes for state highways, as well as projected average daily traffic volumes for the year 2026. The projected volumes for 2026 are based on historical growth trends or travel demand modeling where available.
(B) The Future Volume Table includes projections for three highway segments within Joseph: Oregon 82 north of Imnaha Highway, Imnaha Highway east of Oregon 82, and Oregon 82 south of Imnaha Highway. For all segments of highway, the forecasts from the Future Volume Tables had r-squared values of 0.77 or higher, so were deemed acceptable for use. Using these forecasts, an annual compound growth rate of 2.0% was calculated and applied to the 30 HV developed for the year 2008 over a 22-year period to estimate traffic volumes at study intersections during the year 2030. These volumes have been provided in the “Existing and Future AM/PM Peak Hour Traffic Volumes” map.
(Ord. passed 6- -2009)