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MOUNTAIN HOUSE NEIGHBORHOOD"F"PROJECT INITIAL.STUDY As part of the findings for the 1994 Master Plan EIR, the project sponsor was required to participate in the study and construction of improvements on I-205 (MP 9.2, Imp. b)and shall also participate on a fair share basis in the addition of HOV lanes to 1-205 (MP 9.2, Imp. e). The first step in the development of improvements within the Caltrans right-of-way is the development of a Project Study Report/Project Report (PSR/PR). The purpose of the Combined PSR/PR is to streamline the project development process by providing for the preparation of a single engineering report for non-complex,non-controversial State highway projects that are funded by others and that cost over$1,000,000 for construction. The Combined PSR/PR eliminates the separate processing of a PSR and should expedite project delivery. It constitutes project approval to proceed with design and as such serves as the project report. Although one report is prepared, it is expected that the report will address issues affecting operation,maintenance, and any potential tort liability on the State highway, and that the proposed work will conform to current Caltrans policies, practices and standards. Implementation of the following mitigation measures would reduce project impacts to segments of Mountain House Parkway and Mascot Boulevard to less-than-significant levels: Mitigation Measure TRAFFIC-1: The project sponsor shall fund the preparation of a Project Study Report(PSR)for the I-205 interchange at Mountain House Parkway prior to the approval of the first final map. The determination of the level of service within the interchange shall be evaluated as part of the project's annual monitoring program. The monitored level of service shall be consistent with the procedures established in the Highway Capacity Manual LOS D is the adopted threshold for the acceptable operation of the interchange In the event that project-related traffic causes the levels of service to reach the LOS D threshold before reaching LOS E, issuance of building permits shall cease until necessary improvements to maintain the level of service are implemented. Mitigation Measure TRAFFIC-2: A 250-to 500 foot four-lane section, as adequate to accommodate traffic volumes,shall be provided on both the northbound and southbound approaches of Mountain House Parkway at Grant Line Road and Mascot Boulevard The j implementation of these improvements shall be evaluated annually as part of the project's annual monitoring program. The monitored levels of service shall be consistent with the procedures for capacity analysis as established in the Highway Capacity Manual However, once the intersection level of service reaches the LOS D threshold before reaching LOS E, these improvements shall be constructed prior to the issuance of any additional residential building permits. Mitigation Measure TRAFFIC-3: The intersection of Mascot Boulevard and Mountain House Parkway shall be improved to provide two northbound, left-turn lanes on Mountain House Parkway. In addition, the free-right turn recommended on the eastbound approach shall be constructed such that the traffic using this lane merges into southbound Mountain House Parkway traffic into a separate travel lane Therefore, a southbound acceleration lane located south of Mascot Boulevard shall be provided to insure a smooth and unrestricted transition onto Mountain House Parkway. To accommodate the northbound dual left-turn lanes, Mascot Boulevard shall be constructed as a four-lane facility between Mountain House Parkway and the first residential access point to the west of DeAnza Boulevard. C'JOMICUNRUL=Y\FINALINMAL=Y-PARn.WC(7/22=) 59 V.F. TRANSPORTATIONn RAFFIC