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TABLE OF CONTENTS LSECTIONS........................................................................................................................................................... PAGE INTRODUCTION.........................................................................................................................................................I �. SETTING......................................................................................................................................................................I PREVIOUSSTUDIES..................................................................................................................................................I CIRCULATION NETWORK.......................................................................................................................................5 L STUDY AREA INTERSECTIONS AND ROADWAY SEGMENTS.........................................................................6 EXISTING TRAFFIC VOLUMES...............................................................................................................................6 LEVEL OF SERVICE METHODOLOGY...................................................................................................................7 L EXISTING CONDITIONS TRAFFIC OPERATIONS..............................................................................................11 EXISTING CONDITIONS ACCIDENT DATA ANALYSIS...............................................:....................................12 PROPOSEDPROJECT...............................................................................................................................................14 YEAR 2007 BASE TRAFFIC VOLUMES.................................................................................................................16 YEAR 2007 BASE TRAFFIC OPERATIONS...........................................................................................................20 YEAR 2007 PLUS PROJECT TRAFFIC VOLUMES...............................................................................................24 YEAR 2007 PLUS PROJECT TRAFFIC OPERATIONS..........................................................................................25 L YEAR 2027 BASE TRAFFIC VOLUMES.................................................................................................................30 YEAR 2027 BASE CONDITIONS TRAFFIC OPERATIONS..................................................................................32 YEAR 2027 PLUS PROJECT TRAFFIC VOLUMES...............................................................................................38 YEAR 2027 PLUS PROJECT TRAFFIC OPERATIONS..........................................................................................40 KOSTER ROAD/DESILVA GATES QUARRY ENTRANCE INTERSECTION....................................................45 ROADWAY TRAFFIC INDEX(TI)VALUES..........................................................................................................46 ` ROADWAY TYPICAL CROSS SECTIONS.............................................................................................................48 BRIDGE/STRUCTURE CROSSINGS.......................................................................................................................49 IMPACTS AND MITIGATION MEASURES...........................................................................................................49 L LIST OF FIGURES LFigure 1 —Project Location Map...................................................................................................................................2 Figure 2—DeSilva Gates Quarry Mine Development Plan...........................................................................................3 Figure 3—Vernalis Area Quarry Producers..................................................................................................................4 r Figure 4—Existing Conditions Study Area Peak Hour Traffic Volumes......................................................................8 Figure 5—Existing Conditions Daily Traffic Volumes.................................................................................................9 Figure 6—Year 2007 Base Study Area Peak Hour Traffic Volumes..........................................................................18 Figure 7—Year 2007 Base Daily Traffic Volumes.....................................................................................................19 Figure 8—Year 2007 Base Study Area Peak Hour Traffic Volumes:Interchange Design Alternatives.....................21 Figure 9—Design Alternative 1 Through Alternative 3 Recommended Intersection Geometrics&Control.............22 Figure 10—Year 2007 Plus Project Study Area Peak Hour Traffic Volumes.............................................................26 Figure I1 —Year 2007 Plus Project Daily Traffic Volumes........................................................................................27 Figure 12—Year 2007 Plus Project Study Area Peak Hour Traffic Volumes:Interchange Design Alternatives.......28 Figure 13—Year 2027 Base Conditions Study Area Peak Hour Traffic Volumes......................................................33 .. Figure 14—Year 2027 Base Conditions Daily Traffic Volumes.................................................................................34 Figure 15—Year 2027 Base Conditions Study Area Peak Hour Traffic Volumes:Interchange Design Alternatives................................................................................................................................................35 r. Figure 16—Year 2027 Plus Project Study Area Peak Hour Traffic Volumes.............................................................41 Figure 17—Year 2027 Plus Project Daily Traffic Volumes........................................................................................42 Figure 18—Year 2027 Plus Project Study Area Peak Hour Traffic Volumes:Interchange Design Alternatives.......43 L Draft DeSilva Gates Quarry Traffic&Circulation Analysis i August 2005 Jones&Stakes (R905TIS001/25-4000-02)