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p 07 Saunders said that one reason leading the charge from technical standpoint for a unification of MPOS is that we now have one regional model . In the 1980s each MPO had a separate model . Now we have one model that incorporates both MPOs . We have approximately 1 , 000 analysis groups that are called Transportation Analysis Zones (TAZ ) in our urbanized area . In CAMPO they have about 2000 TAZs . All the pieces are necessary to create a realistic picture of what the public is doing . Certainly people aren 't stopping at the county line and not going to Raleigh . The regional model was encouraged to get the big picture . Saunders pointed out the diagram of forecasting model steps in the handout materials . Smith asked for information about the interface between the model and air quality process and Mobile 5 . Saunders explained that certain pieces of information come out of the model and go into Mobile 5 , too identify the best alternatives thatreach - the desired ` goals ., Performance standards , suc 41 as VMTs , Occupancy, and Air Quality are looked at to determine the best alternatives . Then focus is upon the alternatives that we want to take forward and do air quality testing . Bonk added that vehicle miles traveled (VMT) is a gross number , not broken into speed groups , because as the criteria that one alternative might have 100 , 000 another might have 75 , 000 , because the alternative with less VMTs should be better for air quality issues . Saunders continued with we have a two - step process of going through alternatives . The first step is looking at performance indicators and picking out the best alternatives that have the best indicators . Step two is when we do more analysis and environmental impacts , cost impacts , social impacts , to narrow it down to the best alternative by using the air quality factors . By using both citizen advisory groups , the policy board and technical board , we come up with numerical targets for different indicators . We 've identified goals and now we are trying to link those goals to performance indicators and come up with what is the acceptable level of indication . One idea is to go ahead and run the alternatives and see which one has the highest results . Another idea is to go ahead and establish those goals before the model is run . Saunders referred to a chart in the handout, which summarizes the Long - Range Plan and how the other steps are centered around the plan . Stancil asked about recent media reports on the " Mayors ' Initiative " and the issue of "Town / Rail " . Bonk reported that the mayors of Chapel Hill , Durham , Cary and Raleigh want a new plan that will enable local governments in this DRAFT CFE 10/09/00 Minutes Page 6 of 10 L :\Carol\CFEMIN\OCT2000CFErevised by rich. doc