Initial Study MND - Sonoma County Agricultural Preservation and ...

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Taylor MountainINITIAL STUDY/MITIGATED NEGATIVE DECLARATIONa. Conflict with an applicable plan, ordinance or policy establishing measures ofeffectiveness for the performance of the circulation system, taking into account all modesof transportation?LESS THAN SIGNIFICANT IMPACT. Implementation of the proposed Master Plan would facilitatemulti-use public access to the Taylor Mountain Preserve and would be consistent with Countyof Sonoma and City of Santa Rosa policies and plans regarding circulation for all modes oftransportation. Both intersection and roadway LOS analyses were conducted for the proposedproject. Study intersections and roadways for both the ‘Existing plus Project Conditions’ andthe ‘Future plus Project Conditions’ are expected to operate with acceptable levels of service.Construction activity would be temporary and distributed among the various staging areas. It isnot expected that construction at each staging area will occur simultaneously, as development ofthe park will occur in phases, as funding is secured. Therefore, modeling was not performed forproject construction because construction activity is expected to generate less traffic than fullpark operations. Traffic modeling was performed for project operations, and the results arediscussed below.Intersection OperationExisting plus Project Conditions. Upon implementation of the proposed project improvementsand the addition of project-related traffic to the existing volumes, the study intersections areexpected to continue to operate at LOS C or better, which is considered acceptable by thecriteria established by the City of Santa Rosa and County of Sonoma for their respectivefacilities. These results, which are summarized in Table B.3.14-9, indicate very minor increases(less than one second) in vehicle delay as a result of the project. As shown in the table, projectrelatedtraffic will not result in a change in LOS. The project would decrease average delay atKawana Terrace/Meda Avenue, which may appear counterintuitive to expectations; however,this is due to the fact that the project would contribute only to uncontrolled throughmovements which do not experience delay, thereby reducing overall average delay.Table B.3.14-9. Summary of Existing and Existing plus Project Peak Hour Intersection LOS CalculationsStudy IntersectionApproachExisting ConditionsExisting plus ProjectPM Peak Mid Peak PM Peak Mid PeakDelay LOS Delay LOS Delay LOS Delay LOS1. Petaluma Hill Rd/Kawana Springs Rd 18.8 B 19.9 B 19.3 B 20.6 B2. Kawana Springs Rd/Franz Kafka RdNorthbound Franz Kafka Rd3. Kawana Terrace/Meda AveSouthbound Meda Ave5. Petaluma Hill Rd/Taylor Mountain N DrivewayWestbound Driveway6. Petaluma Hill Rd/Taylor Mountain S DrivewayWestbound Driveway0.811.25.98.4Notes: LOS results are for the intersection as a whole. Results for minor approaches to two-way stop-controlled intersections are indicated initalics; Intersection 4, Kawana Springs Road/Farmers Lane does not exist during Existing Conditions; Project driveways are analyzedonly under plus project conditions; Delay is measured in average seconds per vehicle; LOS = Level of ServiceABAA1.110.44.48.5ABAA1.011.43.38.50.014.50.115.6ABAAABAC1.610.71.38.70.112.70.313.1ABAAABABFinal B-112 September 2012
Taylor MountainINITIAL STUDY/MITIGATED NEGATIVE DECLARATIONFuture plus Project Conditions – Cumulative Scenario. Upon the addition of project-generatedtraffic to the anticipated future no-project volumes, and with the construction of the FarmersLane Extension, the study intersections are expected to operate at acceptable LOS C or better,as defined by the City of Santa Rosa and the County of Sonoma for their respectiveintersections. The future plus proposed project operating conditions are summarized in TableB.3.14-10. Compared to existing conditions, the addition of traffic from future development inthe area would result in a change of LOS from B to C. According to significance criteria, LOS C isconsidered acceptable and impacts would be less than significant. Furthermore, as shown inthe table, the proposed project’s contribution to cumulative traffic impacts is about one secondor less and the project’s traffic would not result in a change in LOS. Therefore, the project’scontribution to cumulative impacts is very minor and less than significant.Table B.3.14-10. Summary of Future No Project and Future plus Project Peak Hour LOS CalculationsStudy IntersectionApproachExisting Conditions Future Conditions Future plus ProjectPM Peak Mid Peak PM Peak Mid Peak PM Peak Mid PeakDelay LOS Delay LOS Delay LOS Delay LOS Delay LOS Delay LOS1. Petaluma Hill Rd/Kawana Springs Rd 18.8 B 19.9 B 27.6 C 24.1 C 28.9 C 25.3 C2. Kawana Springs Rd/Franz Kafka Rd 0.8 A 1.1 A 0.9 A 1.2 A 0.9 A 1.2 ANorthbound Franz Kafka Rd 11.2 B 10.4 B 13.1 B 11.6 B 13.6 B 12.2 B3. Kawana Terrace/Meda Ave 5.9 A 4.4 A 5.9 A 4.5 A 5.9 A 4.5 ASouthbound Meda Ave 8.4 A 8.5 A 8.4 A 8.5 A 8.4 A 8.5 A4. Kawana Springs Rd/Farmers Lane 22.8 C 18.8 B 23.5 C 19.8 B5. Petaluma Hill Rd/Taylor Mountain NDrivewaynil A 0.1 AWestbound Driveway 20.3 C 16.2 C6. Petaluma Hill Rd/Taylor Mountain SDriveway0.1 A 0.2 AWestbound Driveway 21.9 C 16.5 CNotes: Results for minor approaches to two-way stop-controlled intersections are indicated in italics; Intersection 4, Kawana Springs Road/FarmersLane does not exist during Existing Conditions; Project driveways are analyzed only under plus project conditions; Delay is measured inaverage seconds per vehicle; LOS = Level of Service; nil = calculated overall delay is less than 0.1 secondsRoadway Segment OperationRoadway segment analysis of Bennett Valley Road was not included in the level of servicecalculations because of the small amount of traffic that would be added to Panorama Drive,used to access the Bath-Watt staging area. This is due to the proposed restricted access at theBath-Watt staging area resulting in a small number of new trips.Additionally, Brookwood Avenue and Kawana Springs Road were not included in level of serviceanalysis because the analysis methodology published in the Highway Capacity Manual and LOSstandards established by the County of Sonoma and City of Santa Rosa are intended for use onarterials, and both of these streets are classified as Local Streets by the City of Santa Rosa. Itshould be noted that both agencies require traffic capacity analysis to be completed usingmethodologies published in the Highway Capacity Manual, and only require segment analysisSeptember 2012 B-113 Final
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