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Link-level analysis for Grant Line Road shows that the City of Tracy's programmed improvements for a four-lane high-capacity roadway(in the Tracy Roadway Master Plan)are expected to adequately serve projected future 2025 traffic volumes. Grant Line Road west of Altamont Pass Road is projected to carry a substantial amount of traffic because of traffic being diverted from the freeway.The link volumes are expected to be near capacity.However,Grant Line Road/Mountain House Parkway and Grant Line Road/Altamont Pass Road are expected to operate at LOS D or better with intersection improvements as recommended in the analysis.A four-lane road would be required from Mountain House Parkway to the I-580 interchange.Such a road widening is proposed as part of the College Park project. According to the County and MHCSD adopted agreements,the MHTIF/County TIMF/Offset Program will fund the improvements of Grant Line Road between the Alameda county line and its intersection with I-580. For Eleventh Street east of I-205,the road has been widened to six lanes to increase its capacity to accommodate the projected 2025 traffic volumes to within LOS C.As indicated in the MHMP EIR Eleventh Street between Corral Hollow Road and Tracy Boulevard needs to be upgraded to increase its capacity.A section of the street just east of Corral Hollow Road is a six-lane road. Safety and operational improvements(to increase capacity to 1,900)and intersection improvements are required at Eleventh Street/Corral Hollow Road and Eleventh Street/Tracy Boulevard.Developments in Mountain House will pay their fair share of these improvements through participation in the County TAU/Offset Program. _ Despite the implementation of safety and operational improvements on Altamont Pass Road west of Grant Line Road,this roadway segment is expected to operate at LOS F after mitigation,which is similar to the results identified in the MHMP EIR. Therefore,the cumulative traffic effect on this segment would be significant. However,the proposed intersection mitigation(see Table 4.11-6)would enable the intersection of Altamont Pass Road/Grant Line Road to operate at acceptable LOS C. In addition,the widening of Byron Road to four lanes east of Grant Line Road is expected to reduce congestion on this portion of this roadway,but this segment is expected to operate at LOS D following mitigation.The MHMP EIR analysis indicated that this segment would operate at LOS C.The standard for this roadway segment is LOS C. Although the I-205/Lammers Road Interchange would likely reduce the traffic effect to an acceptable level on this segment(i.e.,LOS C),funding is not currently available for this improvement. Therefore,the cumulative traffic effect on this segment would be potentially significant. As noted above,a comparison of the LOS results shown in Table 4.11-12 indicates that 2025 with-project buildout with the I-205/Lammers Interchange would have less impact on most roadway arterials than the scenario without the I-205/Lammers Interchange.Table 4.11-12 also shows that the proposed extension of Lammers Expressway and the construction of the interchange would divert some future traffic from Byron Road.However, traffic impacts on the major freeways in the vicinity of the project would remain the same for the two scenarios, as shown in Table 4.11-13.As mentioned earlier,funding is currently not available for the construction of the Lammers Interchange,and only the PSR study is currently being conducted. Analysis of Intersection Operations—Future 2025 With Project The projected peak-hour turning movements at all study intersections are illustrated in Figures 4.11-10a and 4.11-10b for the 2025 with-project buildout without the I-205/Lammers Interchange.Figures 4.11-1 la and 4.11-1 lb show the turning-movement volumes for 2025 with-project buildout with the I-205/Lammers Interchange. College Park at Mountain House Specific Plan III Draft EIR EDAW San Joaquin County 4.11.41 Transportation