LARIMER COUNTY RURAL AREA ROAD STANDARDS

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Table of Contents4.9.1.3 Lane Alignment ..................................................................................................................................4-94.9.1.4 Angle of Intersection ..........................................................................................................................4-94.9.1.5 Horizontal Alignment and Vertical Profile.........................................................................................4-94.9.1.6 Auxiliary Lanes ..................................................................................................................................4-94.9.1.7 Design Vehicles................................................................................................................................4-104.9.1.8 Curb Returns.....................................................................................................................................4-104.10 ROAD NAME SIGNS AND TRAFFIC CONTROL DEVICES...................................................................4-114.10.1 General..................................................................................................................................4-114.10.2 Traffic Signing.......................................................................................................................4-114.10.2.1 Type and Location of Signs............................................................................................................4-114.10.2.2 New Roadway.................................................................................................................................4-114.10.2.3 Sign Posts, Supports, and Mountings..............................................................................................4-114.10.2.4 Sign Reflectivity.............................................................................................................................4-124.10.2.5 Panel Guage....................................................................................................................................4-124.10.3 Intersections ..........................................................................................................................4-124.10.3.1 Road Name Signs at Intersections ..................................................................................................4-12CHAPTER 5 – GEOTECHNICAL STANDARDS AND PAVEMENT DESIGN ..............................5-15.1 SCOPE ................................................................................................................................................5-15.2 GENERAL ...........................................................................................................................................5-15.3 SOILS INVESTIGATION........................................................................................................................5-15.3.1 Existing Pavement .....................................................................................................................5-15.3.2 Soils Investigation Report Content............................................................................................5-15.3.3 Soil Samples ..............................................................................................................................5-25.3.4 Soil Grouping ............................................................................................................................5-25.3.5 Classification Testing ................................................................................................................5-25.3.6 Subgrade Support Testing .........................................................................................................5-35.3.6.1 Hveem Stabilometer ...........................................................................................................................5-35.3.6.2 Swell Tests..........................................................................................................................................5-35.3.7 Mitigation of Soils Problems.....................................................................................................5-35.4 PAVEMENT DESIGN STANDARDS........................................................................................................5-45.4.1 General Design Factors ............................................................................................................5-45.4.1.1 Minimum Thicknesses........................................................................................................................5-45.4.2 Special Considerations..............................................................................................................5-45.4.2.1 Staged Construction............................................................................................................................5-45.4.2.2 Full Depth Sections ............................................................................................................................5-45.4.2.3 Rehabilitating Existing Asphalt Roads ...............................................................................................5-45.4.2.4 Auxiliary Lanes ..................................................................................................................................5-45.5 FLEXIBLE PAVEMENT DESIGN............................................................................................................5-55.5.1 Definition...................................................................................................................................5-55.5.2 AASHTO Design Approach .......................................................................................................5-55.6 RIGID PAVEMENT DESIGN..................................................................................................................5-75.6.1 Definition...................................................................................................................................5-75.6.2 AASHTO Design Approach .......................................................................................................5-85.6.3 Material Standards....................................................................................................................5-85.7 SUBGRADE INVESTIGATION AND PAVEMENT DESIGN REPORT...........................................................5-9CHAPTER 6 – STORMWATER MANAGEMENT .............................................................................6-16.1 GENERAL ...........................................................................................................................................6-16.2 CROSS FLOW DRAINAGE STRUCTURES ..............................................................................................6-1CHAPTER 7 – BRIDGES AND MAJOR DRAINAGE STRUCTURES.............................................7-17.1 DESIGN STANDARDS ..........................................................................................................................7-17.2 IRRIGATION COMPANY APPROVAL.....................................................................................................7-17.2.1 General......................................................................................................................................7-17.2.2 Required Information ................................................................................................................7-17.2.3 Required Studies........................................................................................................................7-27.2.4 Final Plans and As-Built Drawings ..........................................................................................7-2Larimer County Rural Area Road StandardsOctober 22, 2007Page iii
Table of ContentsCHAPTER 8 – ENVIRONMENTAL AND AGRICULTURAL DESIGN GUIDELINES ................8-18.1 PRE-DESIGN STAGE ...........................................................................................................................8-18.2 DESIGN DOCUMENTS STAGE..............................................................................................................8-28.3 PRELIMINARY REVIEW STAGE ...........................................................................................................8-38.4 FINAL DESIGN STAGE ........................................................................................................................8-38.5 CONSTRUCTION STAGE ......................................................................................................................8-38.6 PROJECT CLOSEOUT...........................................................................................................................8-4CHAPTER 9 – ROADWAY INSPECTION AND TESTING PROCEDURES ..................................9-19.1 GENERAL REQUIREMENTS .................................................................................................................9-19.1.1 Construction Requirements .......................................................................................................9-19.1.2 Developer Responsibility...........................................................................................................9-19.1.3 Definitions .................................................................................................................................9-29.1.3.1 Quality Control...................................................................................................................................9-29.1.3.2 Quality Assurance...............................................................................................................................9-29.2 INSPECTIONS ......................................................................................................................................9-29.2.1 Larimer County .........................................................................................................................9-29.2.2 Developer ..................................................................................................................................9-29.3 TESTING..............................................................................................................................................9-39.4 WARRANTY PERIOD .............................................................................................................................9-3CHAPTER 10 – ACCESS REQUIREMENTS AND CRITERIA ......................................................10-110.1 INTRODUCTION ..............................................................................................................................10-110.1.1 Authority................................................................................................................................10-110.1.2 Purpose..................................................................................................................................10-110.1.3 Implementation......................................................................................................................10-110.2 ADMINISTRATION...........................................................................................................................10-210.2.1 New Developments ................................................................................................................10-210.2.1.1 Land Division .................................................................................................................................10-210.2.1.2 Site Plan..........................................................................................................................................10-210.2.1.3 Interim Access ................................................................................................................................10-210.2.2 Existing Lots..........................................................................................................................10-310.2.3 Appeal Process......................................................................................................................10-310.2.4 Illegal Access.........................................................................................................................10-310.2.5 Maintenance..........................................................................................................................10-310.2.6 Change in Use of Access .......................................................................................................10-310.2.7 Non-Use of Access.................................................................................................................10-410.3 ACCESS CONTROL STANDARDS......................................................................................................10-410.3.1 Freeways and State Highways...............................................................................................10-410.3.2 Arterials.................................................................................................................................10-410.3.2.1 Spacing and Signalization Criteria..................................................................................................10-510.3.3 Major and Minor Collectors .................................................................................................10-510.3.4 Local Streets..........................................................................................................................10-510.4 ACCESS DESIGN STANDARDS AND SPECIFICATIONS.......................................................................10-610.4.1 Basic Criteria ........................................................................................................................10-610.4.2 Number of Accesses...............................................................................................................10-710.4.3 Minimum Spacing Between Accesses ....................................................................................10-610.4.4 Joint Entrances......................................................................................................................10-710.4.5 Entrance Angle......................................................................................................................10-710.4.6 Access Approaches................................................................................................................10-710.4.7 Width of Access .....................................................................................................................10-710.4.8 Access Radii ..........................................................................................................................10-710.4.9 Access Surfacing....................................................................................................................10-810.4.10 Edge Clearance ...................................................................................................................10-810.4.11 Corner Clearance................................................................................................................10-810.4.12 Sight Distance......................................................................................................................10-8Larimer County Rural Area Road StandardsOctober 22, 2007Page iv
Page 1 and 2: LARIMER COUNTYRURAL AREA ROAD STAND
Page 3: Table of Contents3.3.11 Typical Str
Page 7 and 8: Table of Contents12.3.7.2 Conventio
Page 9 and 10: Table of ContentsG.7.12 Other Permi
Page 11 and 12: Chapter 1 - General InformationSect
Page 17 and 18: Chapter 2 - Submittal ProceduresSec
Page 19 and 20: Chapter 2 - Submittal ProceduresSec
Page 21 and 22: Chapter 3 - Submittal Requirements
Page 27 and 28: Chapter 4 - Road Design and Technic
Page 35 and 36: 4.9.1.7 Design VehiclesChapter 4 -
Page 39 and 40: CHAPTER 5 - GEOTECHNICAL STANDARDS
Page 41 and 42: Chapter 5 - Geotechnical Standards
Page 49 and 50: Chapter 6 - STORMWATER MANAGEMENTSe
Page 51 and 52: Chapter 7 - Bridges and Major Drain
Page 53 and 54: Chapter 8 - Environmental and Agric
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Chapter 8 - Environmental and Agric
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9.1.3 DefinitionsChapter 9 - Roadwa
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CHAPTER 10 - ACCESS REQUIREMENTS AN
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Chapter 10 - Access Requirements an
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CHAPTER 11 - ACCESS AND UTILITY PER
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Chapter 12 - Right of Way Permittin
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Appendix A - Definitions and Abbrev
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Appendix A - Definitions and Abbrev
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APPENDIX B - REFERENCES AND RESOURC
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APPENDIX D - CONSTRUCTION STANDARDS
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Appendix D - Construction Standards
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APPENDIX E - CONSTRUCTION TESTING F
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Appendix F - Guidelines for Traffic
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APPENDIX G - DESIGN AND CONSTRUCTIO
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Appendix G - Design and Constructio
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Appendix H - General NotesSection H
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APPENDIX I - VARIANCE REQUEST SUBMI
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LARIMER COUNTY RURAL AREA ROAD STANDARDS

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