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House project, including the pending Neighborhood F Project inside and outside the County. While other methods could be used, this method validly evaluates cumulative traffic impacts. The County finds that, unlike the 2010 traffic model,many cumulative traffic models used by other jurisdictions, such as Alameda County, do not consider the other jurisdiction's cumulative traffic effect beyond the political boundary of the other jurisdiction. Concerning those roads that showed an increase of cumulative traffic, the County Planning Department and the independent consultant determined that these changes were not due to changes in the Project or that such impacts, although not more severe than reported in the 1994 Master EIR, are mitigated by applying the 1994 Master EIR's mitigation measure of road widening. No substantial changes have occurred in the cumulative traffic analysis which would require major revisions to the 1994 Master EIR. Cumulative traffic impacts have been recalculated for 2010 using the same accelerated build-out assumptions for Mountain House as the 1994 Master EIR, but with current regional housing, employment and traffic projections. The traffic study found that projected cumulative traffic conditions are essentially of similar or lower overall volumes than documented in the 1994 Master EIR resulting in generally similar or lower cumulative traffic volumes. Cumulative traffic impacts are also essentially similar or of lower impact than the 1994 Master EIR. The Initial Study traffic study found substantial decreases in freeway and highway traffic on 7 of the 9 segments evaluated and small increases on two segments. All freeway/highway segment levels of service remained the same or improved in comparison to the 1994 Master EIR traffic analysis. Of the 24 arterial road segments evaluated, 11 had similar levels of service, 11 had improved levels of service, and two, Grant Line Extension and Tracy Boulevard north of Lammers Road,had decreased levels of service. The few road segments with lower levels of service can be mitigated with measures similar to that proposed in the MEIR. The proposed Grant Line Road Extension which is currently projected to have LOS "D" in comparison to prior MEIR projections of LOS "C" can be mitigated by amending the LOS standard from "C" to "D" as was done for Grant Line Road within Mountain House, or by widening the road from four to six lanes. A portion of the proposed roadway within one-quarter mile of 1-205 already is designated for a LOS "D" standard under the Tracy General Plan. Tracy Boulevard north of Lammers Road is projected to decrease in Level of Service from LOS "C"to LOS "D" in A.M. and LOS "E" in P.M. This impact can be mitigated by adding the roadway to the San Joaquin County Traffic Impact Mitigation Fee (TIMF) program at the appropriate time for widening from two to four lanes. The added mitigation measures are to be incorporated into the environmental documentation for the Neighborhood F Project which will be tiered onto the MEIR. As such, no major revisions are needed to the MEIR to incorporate these changes. Some roadway segments have improved levels of service that now require no mitigation improvements for 2010. However, it is expected that these improvements will still be needed in the future beyond 2010. The Master Plan and MSIR require a full traffic 19