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Table 8 <br />Gravity Model Parameters <br />2008 Kittitas County Transportation Planning Model <br />Trip <br />Purpose <br />Beta <br />Exponent <br />Alpha <br />Exponent <br />Constant <br />HW <br />2.00 <br />-0.2 <br />100 <br />WH <br />2.00 <br />-0.2 <br />100 <br />HO <br />2.70 <br />-0.2 <br />100 <br />OH <br />2.70 <br />-0.2 <br />100 <br />NHB <br />2.80 <br />-0.1 <br />100 <br />Truck <br />2.2 <br />-0.,5 <br />100 <br />The volumes and volume/capacity ratios for links or streets were plotted for <br />comparison with the future year alternatives. These colors range light green through <br />dark green, orange, red, and dark red to show increasing amounts of congestion. <br />Kittitas County, Washington Transportation Model - May 2009 Page 39 <br />