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Summary of 2025 Cumulative Traffic Analysis for With-Project Conditions on Anticipated Network Under both scenarios(with/without Lammers/I-205 Interchange),all the proposed on-site and off-site project roadways would be built to accommodate projected traffic.It is anticipated that Great Valley Parkway,Central Parkway,and DeAnza Boulevard will be constructed to be four lanes(two lanes per direction).It is also anticipated that Mountain House Parkway from south of Mascot Boulevard to Von Sosten Road and Byron Road from south of Central Parkway to Henderson Road will be constructed to be six lanes(three per direction).Mountain House Parkway from south of Von Sosten Road to the freeway will be improved to an eight-lane section.The detailed left- and right-tum channelization for all the study intersections is shown in Figures 4.11-12a and 4.11-12b. Table 4.11-18 summarizes the mitigation for 2025 with-project buildout.The table summarizes roadway ` mitigation measures differentiated as follows:those initially identified in the MHMP EIR;those required by MHTIF/MHT MF;those required based on the current analysis of year 2025 with-project conditions;and improvements included as part of the proposed project.The lane configurations required at all the 47 study intersections to mitigate projected MHMP impacts are shown in Figure 4.11-13.The assumed roadway improvements are consistent with the buildout roadway assumptions of the MHMP. As a condition of approval of the Tentative Map for the proposed College Park project,the MHCSD would require the proposed project to implement roadway improvements based on triggering analysis.As mentioned earlier,Mitigation Measure 4.12-1(h)in the MHMP EIR requires that annual traffic monitoring and review/reporting be conducted to determine the progress of the required transportation improvements.In addition, based on the monitoring results,the County can adopt additional findings related to whether the adopted trigger points for transportation improvements and the project's fair share of costs should be revised to ensure the timely construction of needed improvements, as a condition of further development approvals. V As stated in the MHMP EIR,traffic congestion on Altamont Pass Road west of Grant Line Road and on segments of 1-205,1-580,and I-5 would remain a significant impact.The Mountain House Parkway/I-205 PSR has been approved and it is estimated that construction of this interchange could begin in mid-2005.The interchange improvement includes a six-lane overpass and loop on-ramp from southbound to eastbound on I-205.It is our understanding that the funding for the widening of I-205 from four to six lanes has been approved for the next fiscal year.This will be a substantial improvement to the existing condition.hr addition to the significant impact on these roadways,the current analysis shows that Byron Road east of Grant Line Road may operate at LOS D.Because the standard for this segment is LOS C,this would be a potentially significant impact.Traffic effects on this roadway were projected to be at LOS C in the MHMP EIR with implementation of the approved roadway improvements. Mitigation Measure 4.11-1:Transportation—Effects on 2025 Cumulative With-Project Conditions on Anticipated w Network. For consistency with previously adopted roadway standards,the County shall extend the standard of LOS D to the segment of Byron Road east of Grant Line Road. Because Byron Road is a major regional arterial serving the area,the County shall extend implementation of MHMP EIR mitigation M 4.12-5(e)to apply to Byron Road east of Grant Line Road.MHMP EIR Mitigation Measure M 4.12-5(e)states that for consistency with the MHMP,and to promote transit/high-occupancy vehicle usage and efficient land use,the County should amend its General Plan policy that requires LOS C on all county road segments in the Tracy planning area, as follows: "Permit LOS D on new community gateways that are used as major commute routes, subject to the approval of the County."It has become more evident in the past few decades that current experiences of best practices and context-sensitive design support the adoption of LOS D as an applicable standard.Adopting LOS C standards for street design can lead to unusually wide streets,high speeds,and insensitive pedestrian and bicycle design.For example, in this case,at LOS D a four-lane roadway would suffice whereas at LOS C standard requires a six-lane roadway. College Park at Mountain House Spedrf'ic Plan III Draft EIR EDAW San Joaquin County 4.11-51 Transportation