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Base#ne Forecasts ' Land Use Forecasts The land use forecasts used in the baseline traffic estimates are based on ABAG - Projections ~jO (see Table 4-1). Minor modifications were made to the ABAG data to shift some future houses and jobs between jurisdictions, but the Td-Valley land use totals are within one percent of the ABAG forecasts. Note that ABAG forecasts are not -- constrained by ~nt~rastructure availability or political viabiLity. For comparison purposes, Exhibit 1 shows a comparison to ABAG Projections '92. The 2010 land use forecasts do not represent buildout of the Tri-Valley area, as ' spedfled by each jurisdiction's general plan. Rather, the forecasts represent likely absorption rates for new houses and businesses between now and 2010. _ Network Assumptions Staff from the Tri-Valley jurisdictions outlined the future road network ass,,mptions as of 1992 (see Figure 4-1). The major criterion that was considered when including a particular improvement in the future road network was whether that improvement was likely to be constructed by 2000 or 2010. Not all of the future road network is currently funded. This is discussed further in Chapter 7. The improvements to state highways included in the future road networks were shown in the MTC 1991 Regional Transportation Plan and are either fully or partially funded. These include high occupancy vehicle (HOV) lanes on 1-680, auxiliary lanes on 1-680, a southbound-to-eastbeund flyover ramp at the 1-580/I-680 interchange, and widening of Route 84. Also in the category of regional improvements, the 2010 network included the extension of BART service to East Dublin/Pleasanton. The local road widenings and extensions included in the future networks are all included in local general plans and are all funded or expected to be funded by 2010. Many are anticipated to be funded with impact fees on new development or will be built by developers to serve their development projects. Barton-Aschman Associates, Inc. 42