LARIMER COUNTY RURAL AREA ROAD STANDARDS

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LARIMER COUNTY RURAL AREA ROAD STANDARDSTable of ContentsCHAPTER 1 – GENERAL INFORMATION........................................................................................1-11.1 PURPOSE ............................................................................................................................................1-11.2 SCOPE ................................................................................................................................................1-11.3 AUTHORITY........................................................................................................................................1-11.4 APPLICABILITY ..................................................................................................................................1-11.5 AMENDMENT AND REVISIONS............................................................................................................1-11.6 ENFORCEMENT RESPONSIBILITY ........................................................................................................1-21.7 REVIEW AND APPROVAL....................................................................................................................1-21.8 INTERPRETATION ...............................................................................................................................1-21.9 RELATIONSHIPS TO OTHER STANDARDS ............................................................................................1-21.10 VARIANCES (DEPARTURES FROM THE STANDARDS) AND APPEALS..................................................1-31.11 AUTHORITY OF DIRECTOR OF PUBIC WORKS ...................................................................................1-31.12 FLOOD PLAIN ...................................................................................................................................1-31.13 COST ESTIMATE AND IMPROVEMENT AGREEMENT ..........................................................................1-31.14 THE PUBLIC ROAD SYSTEM .............................................................................................................1-41.15 NEW COUNTY ROADS ......................................................................................................................1-41.15.1 Planning Standards .................................................................................................................1-41.15.2 Design Standards ....................................................................................................................1-51.15.3 Construction and Testing Standards .......................................................................................1-51.15.4 Construction Warranty and Collateral....................................................................................1-5CHAPTER 2 – SUBMITTAL PROCEDURES......................................................................................2-12.1 DRAWINGS AND SPECIFICATIONS SUBMITTAL PROCEDURE ...............................................................2-12.1.1 General......................................................................................................................................2-12.1.2 Pre-Application Conference......................................................................................................2-12.1.3 Preliminary Design and Final Design.......................................................................................2-12.1.4 Review and Approval Process ...................................................................................................2-12.1.5 Revisions or Updates to Approved Final Construction Plan.....................................................2-22.1.5.1 Submittal Requirements......................................................................................................................2-22.1.5.2 Minor and Major Revisions ................................................................................................................2-22.2 SUBMITTAL CHECKLIST .....................................................................................................................2-3CHAPTER 3 – SUBMITTAL REQUIREMENTS FOR CONSTRUCTION PLANS........................3-13.1 GENERAL ...........................................................................................................................................3-13.2 PLAN SET ...........................................................................................................................................3-13.2.1 Professional Engineer Certification..........................................................................................3-13.2.2 Indemnification Statement.........................................................................................................3-13.2.3 Vicinity Map ..............................................................................................................................3-23.2.4 Key Map ....................................................................................................................................3-23.3 CONSTRUCTION PLANS AND DETAIL SHEETS.....................................................................................3-23.3.1 Title Block .................................................................................................................................3-23.3.2 Standard Signature Block..........................................................................................................3-23.3.3 Construction Benchmark Monumentation.................................................................................3-33.3.4 General Standard Notes for Final Construction Plans .............................................................3-33.3.5 Scale ..........................................................................................................................................3-33.3.6 North Arrow ..............................................................................................................................3-33.3.7 Date of Plan ..............................................................................................................................3-33.3.8 Index..........................................................................................................................................3-33.3.9 Legend of Symbols.....................................................................................................................3-33.3.10 Utilities....................................................................................................................................3-3Larimer County Rural Area Road StandardsOctober 22, 2007Page i
Table of Contents3.3.11 Typical Street Sections ............................................................................................................3-33.3.12 Roadway Cross Sections..........................................................................................................3-43.3.13 Street Improvement Details .....................................................................................................3-43.4 REQUIREMENTS FOR ROAD PLAN AND PROFILE DRAWINGS...............................................................3-43.4.1 Plan View ..................................................................................................................................3-43.4.2 Profile........................................................................................................................................3-53.5 SIGNING AND STRIPING PLANS...........................................................................................................3-53.5.1 Signing Plan ..............................................................................................................................3-63.5.2 Striping Plan .............................................................................................................................3-63.5.3 Signing and Striping Plan Notes ...............................................................................................3-63.5.4 Signing and Pavement Marking Details....................................................................................3-63.5.5 Construction Areas....................................................................................................................3-63.6 LANDSCAPE PLANS ............................................................................................................................3-6CHAPTER 4 – ROAD DESIGN AND TECHNICAL CRITERIA.......................................................4-14.1 GENERAL ...........................................................................................................................................4-14.2 NEW ROADS.......................................................................................................................................4-14.3 ROAD DESIGN ....................................................................................................................................4-24.3.1 Classifications ...........................................................................................................................4-24.3.2 Alignment ..................................................................................................................................4-24.3.2.1 Horizontal Alignment .........................................................................................................................4-24.3.2.2 Vertical Alignment .............................................................................................................................4-34.3.2.3 Sight Distance.....................................................................................................................................4-44.3.3 Cross Slope................................................................................................................................4-44.3.3.1 Minimum Cross Slope ........................................................................................................................4-44.3.3.2 Maximum Allowable Cross Slope......................................................................................................4-44.3.3.3 Cross Slope for Road Modifications...................................................................................................4-44.3.3.4 Cross Slope for Cul-de-Sacs...............................................................................................................4-44.3.4 Superelevation on Horizontal Curves........................................................................................4-44.3.5 Design Speed .............................................................................................................................4-54.3.6 Clear Zone.................................................................................................................................4-54.3.7 Roadscape Design and Right of Way Encroachment ................................................................4-54.3.8Roadside Safety ..........................................................................................................................4-54.4 ROAD SURFACING REQUIREMENTS ....................................................................................................4-54.4.1 Widening of Existing Paved Roadway.......................................................................................4-64.5 MEDIANS............................................................................................................................................4-64.6 NON-CONNECTIVE ROAD ALIGNMENTS.............................................................................................4-64.6.1 Construction Required as Part of Project .................................................................................4-64.6.2 Requirements for Future Road Projections...............................................................................4-64.6.3 Cul-De-Sacs ..............................................................................................................................4-74.7 DRAINAGE SYSTEMS..........................................................................................................................4-74.7.1 Drainage....................................................................................................................................4-74.7.2 Subdrains...................................................................................................................................4-74.7.3 Rural Roadside Ditches.............................................................................................................4-74.7.3.1 Slope...................................................................................................................................................4-74.7.3.2 Maintenance .......................................................................................................................................4-74.7.3.3 Culvert Design....................................................................................................................................4-74.8 EMERGENCY ACCESS REQUIREMENTS ...............................................................................................4-84.8.1 Slope..........................................................................................................................................4-84.8.2 Cross Slope................................................................................................................................4-84.8.3 Lane Width ................................................................................................................................4-84.8.4 Vertical Clearance ....................................................................................................................4-84.8.5 Barricade...................................................................................................................................4-84.8.6 Roadway Surface.......................................................................................................................4-84.9 INTERSECTIONS..................................................................................................................................4-84.9.1 Intersections Type and Design Criteria.....................................................................................4-84.9.1.1 Intersection Control Type ...................................................................................................................4-84.9.1.2 Location of Intersection......................................................................................................................4-9Larimer County Rural Area Road StandardsOctober 22, 2007Page ii
Page 1: LARIMER COUNTYRURAL AREA ROAD STAND
Page 5 and 6: Table of ContentsCHAPTER 8 - ENVIRO
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
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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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