APPENDIX I Traffic Impact Analysis
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APPENDIX I Traffic Impact Analysis Transportation Impact Analysis, Final Report for The Farm at Alamo Creek in the City of Vacaville, CA February 5, 2018 Prepared in accordance of study guidelines set forth by City of Vacaville Prepared by: This report has been prepared and certified by Grant P. Johnson, TE, Principal Traffic Engineering & Transportation Planning WWW.PRISM.ENGINEERING FRESNO, SACRAMENTO Transportation Impact Analysis for The Farm at Alamo Creek, Vacaville, CA, FINAL REPORT TABLE OF CONTENTS Introduction .................................................................................................... 3 Project description ................................................................................................................................ 3 Figure 1. Project Site Plan, Conceptual ................................................................................................ 3 Figure 2. Areas Designated as Urban Reserve ...................................................................................... 5 Figure 3. Vicinity Map and Project Site Location .................................................................................. 6 Analysis scenarios .................................................................................................................................. 8 Environmental Setting ..................................................................................... 9 Road System .......................................................................................................................................... 9 Figure 4. Study Area Intersections and Roadway Segments .............................................................. 10 Existing Conditions .............................................................................................................................. 13 Table 1. Intersection Level of Service Definitions .............................................................................. 14 Table 2: Highway & Ramp Level of Service Criteria ............................................................................ 15 Figure 5. Priority Development Areas ................................................................................................. 16 Table 3. Roadway Segment Capacity and Level of Service Criteria .................................................... 17 Table 4. Existing Conditions Intersection Capacity Analysis ................................................................ 18 Table 5. Link Segment Capacity Analysis for Existing AM and PM Peak Hour ................................... 19 Figure 6. AM Peak Hour Turn Moves, Geometry, and Traffic Control ............................................... 20 Figure 7. PM Peak Hour Turn Moves, Geometry, and Traffic Control ............................................... 21 Table 6. Freeway Capacity Analysis .................................................................................................... 22 Figure 8. Transit Service in Vacaville .................................................................................................. 23 Regulatory Setting ......................................................................................... 26 Federal Regulations ............................................................................................................................. 26 State Regulations ................................................................................................................................. 26 Table 7: City of Vacaville General Plan – Guiding Policies ................................................................... 28 Project Impacts for Existing Conditions Analysis ............................................ 31 Trip Generation ................................................................................................................................... 31 Table 8. Trip Generation of The Farm at Alamo Creek ........................................................................ 32 Table 9. Trip Distribution of Project Traffic to Street System ............................................................ 32 Thresholds of Significance ................................................................................................................... 33 Figure 9. AM Peak Hour Project Only Traffic Volumes ........................................................................ 34 Figure 10. PM Peak Hour Project Only Traffic Volumes ...................................................................... 35 Impacts and Mitigation Measures ....................................................................................................... 37 Table 10. Existing Conditions Plus Project Intersection Capacity Analysis .......................................... 38 Table 11. Existing Plus Project Mitigated Intersection Capacity Analysis ........................................... 41 Cumulative Existing Plus Approved Projects (EAP) Conditions ....................... 42 Development of Baseline EAP Conditions ........................................................................................... 42 Figure 11. AM EAP Turn Moves, Geometry, and Traffic Control ........................................................ 44 Page i Transportation Impact Analysis for The Farm at Alamo Creek, Vacaville, CA, FINAL REPORT Figure 12. PM EAP Turn Moves, Geometry, and Traffic Control ........................................................ 45 Figure 13. AM EAP + Project Turn Moves, Geometry, and Traffic Control ........................................ 46 Figure 14. PM EAP + Project Turn Moves, Geometry, and Traffic Control ........................................ 47 Table 12. EAP and EAP + Project Conditions Intersection Capacity Analysis ...................................... 48 Table 13. Mitigated EAP + Project Conditions Intersection Capacity Analysis .................................... 51 Cumulative Year 2035 Conditions .................................................................. 52 Figure 15. AM Year 2035 Turn Moves, Geometry, and Traffic Control .............................................. 54 Figure 16. PM Year 2035 Turn Moves, Geometry, and Traffic Control .............................................. 55 Figure 17. AM Year 2035 + Project Turn Moves, Geometry, and Traffic Control .............................. 56 Figure 18. PM Year 2035 + Project Turn Moves, Geometry, and Traffic Control ............................... 57 Table 14. Year 2035+Project Conditions Intersection Capacity Analysis ............................................ 58 Table 15. Link Segment Capacity Analysis for Year 2035+Project AM and PM Peak Hour ................. 60 Table 16. Year 2035+Project MITIGATED Conditions Intersection Capacity Analysis ......................... 63 APPENDIX ..................................................................................................................................................... 64 Appendix A, Traffic Model ................................................................................................................... 64 Appendix B, Calculation Worksheets .................................................................................................. 67 Page ii Introduction TIA for The Farm at Alamo Creek, Vacaville, CA, 2/5/2018 Introduction This report has been prepared to provide documentation pertaining to the transportation impact analysis of the proposed the farm at Alamo Creek specific plan project (proposed project) in the City of Vacaville, California sphere of influence. This introduction includes the project description, location, existing uses, land-use program etc. and subsequent sections in this report describe the environmental setting, the regulatory setting, project impacts, cumulative impacts, site circulation, and mitigations. Project description Project information was provided to PRISM Engineering by the City of Vacaville, and utilized in this report for the purposes of roadway location and connections in the traffic model, as well as specific quantities of various land uses in order to calculate trip generation for the project. Figure 1, Project Site Plan, shows the project site specific plan, as well as the roadway system that will serve the project. The project site borders with the PG&E power transmission lines on the east, and includes some of the City’s Urban Reserve area on the east. Figure 1. Project Site Plan, Conceptual Page 3 Introduction TIA for The Farm at Alamo Creek, Vacaville, CA, 2/5/2018 The Farm at Alamo Creek project includes open space, parks, trail amenities, etc., summarized as follows: 768 single-family attached and detached (584 detached and 184 attached), five parks, 13.4 acres of open space, the agricultural buffer, 7.4 acres of neighborhood commercial, and a 9.6-acre detention basin The Farm at Alamo Creek conforms with the recent Update of the Vacaville General Plan. The eastern portion of the area has been designated on the Updated General Plan as ‘Urban Reserve’ and is now included as a part of the project. Figure 2, Areas Designated as Urban Reserve, is a figure showing the locations of the Urban Reserve areas which correspond to Lots #24 and #25 in Figure 1. Project location The proposed project is located generally in the southeastern region of the City of Vacaville, within northern Solano County as shown in Figure 3, Vicinity Map and Project Site Location. The project site is located inside the City’s proposed “sphere of influence”