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Legend <br />Ae serv ttd <br />-lntershtle Pilnclpa l ArltM"itc l (A) <br />-P rlntip1!1Ar1ell8l(RI <br />Rernp:s <br />Mino,-Arl"riEII IRJ <br />Mejor CO,le(,h>r (R) <br />MKlor Colleclor (R) <br />local (R) <br />-!nle~lele Princip~I Artetinl (U) <br />-E11prnswey Principal Ar1erlal lU) <br />-Principe ! Arterl al (U ) <br />-Minor Arterial (U) <br />-Col~tor(U) <br />-l ot11I <br />--Trail <br />TSys <br />I .,. <br />,· ... <br />Figure 3 <br />Kittitas County Link Types <br />VISUM permits the specification of Transportation Systems or TSys for short. Because <br />the network was constructed from the NA VTEQ data, only the model links (those <br />classifications specified with a Type 1-19 were given the ability to carry Cars and <br />Trucks. All of these links permitted both Cars and Trucks. However, trucks were <br />assumed to be equal to four (4) passenger car units (PCU) for capacity and delay <br />computations. This higher value was used to reflect the situations where trucks are <br />operating on steep grades or, when in urban areas, have a lot of starts and stops, <br />making the impact of a truck greater. Therefore, truck assignments were kept separate <br />from the car assignments. It is important during the testing of scenarios that the proper <br />TSys is activated for new links as well as for turns. <br />Kittitas County, Washington Transportation Model -May 2009 Page 12