LARIMER COUNTY RURAL AREA ROAD STANDARDS

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Chapter 10 – Access Requirements and CriteriaSection 10.4 Access Design Standards and Specifications10.4.9 Access Surfacing1. The access shall be surfaced upon completion of the earthwork construction andprior to being used. A delay in placement of hot bituminous pavement due toseasonal restrictions may be allowed provided adequate gravel surfacing issubstituted.2. Asphalt surfacing of the access shall be required when the highway is paved (aminimum 3.5" thick asphalt pavement over 6" thick Class 5 or 6 aggregate basematerial).a. Single-family residential accesses shall be paved 4 feet from the edge of thepavement or to the edge of the shoulder of the County Road, whichever isgreater.b. Multi-family, Commercial and Industrial accesses shall be paved from theedge of the pavement to the right-of-way line.3. Surfacing material shall be specified according to these standards.4. Gravel will be permitted for individual residential access or field entrancesadjacent to County Roads with gravel surfacing. The gravel surface will includeminimum of six inches (6") of compacted Class 5 or 6 aggregate base course orequivalent material from the R.O.W. line to the edge of the traveled roadway.5. Accesses to oil and gas wells shall meet all criteria required by special reviewand/or other local and state requirements.10.4.10 Edge ClearanceEdge clearance is the distance measured along edge of pavement from the nearestedge of the access opening to a point where the property line extended intersects theedge of pavement.1. Residential: 0 feet (preferably not to exceed the property line extended)2. Commercial and Service Stations: 25 ft minimumNOTE: Joint access with adjoining property is encouraged. Joint access shall be the onlyjustification for reducing the minimum edge clearance dimension.10.4.11 Corner ClearanceIt is important to locate driveways away from major intersections. This constraint is asmuch for the ability to enter and leave the property as for the benefit of intersectionsafety and operations. Exiting a driveway during peak-hour conditions at traffic signalsis difficult where the queue of standing or slow-moving vehicles never allows a sufficientgap for entry from the driveway. Corner clearances are specified in Table 10-1.10.4.12 Sight DistanceSight distance for curb openings to private property adjacent to mainline County Roadsshall consist of a sight triangle conforming to the requirements of Chapter 4 of theseRoadway Standards.10.4.13 Speed Lane ChangesSpeed change lanes, also called auxiliary lanes, are useful in maintaining the safety,traffic flow and operation of the highway and access.Larimer County Rural Area Road Standards Page 10-8October 22, 2007
Chapter 10 – Access Requirements and CriteriaSection 10.5 Access Permit Process for Existing Lots1. General Criteria. The speed change lanes shall be constructed according to thefollowing criteria:a. When required by special review or subdivision approval.b. When change in access use will create high volumes of traffic and/orgeometric safety problems exist.2. Design Standardsa. Shall be those required by special review or for subdivision approval.b. As dictated by the current Colorado Department of Transportation StateHighway Access Code. More details are provided in Chapter 4 of thesestandards10.4.14 Access Profile and SlopesFor accesses off of Arterial or Collector County Roads, access profiles shall not exceedthe intersection grade criteria listed in Section 4.9 in Chapter 4.For accesses off of local roads, the access profile shall not to exceed the criteria listed inSection G.7.2.Fill slopes and cut slopes shall be constructed to the slope of the existing County Roadnear the access. It is desirable that all side slopes have a slope no steeper than 3:1.10.4.15 DrainageDrainage associated with accesses shall be in accordance with Chapters 4, 6, andDrawing 11 in Appendix C of these standards, as well the current Larimer CountyStormwater Design Standards.All culverts, shall have flared end sections, and shall be located at the established ditchflowline. A sketch plan of the installation must be submitted with the access permitapplication.10.4.16 Gated AccessesAn access that has a gate across it shall be designed so that the longest vehicle(including trailers) using the access can completely clear the traveled way when the gateis closed.10.5 ACCESS PERMIT PROCESS FOR EXISTING LOTS10.5.1 Obtaining A Permit1. Persons wishing to apply for direct access to a county road should contact theLarimer County Engineering Department. The Engineer may require any of thefollowing items, when relevant to the evaluation of an access:a. County Road and driveway plan and profile including existing accesseslocated within a certain distance of the proposed accessb. Complete drainage plan of the site showing impact to the County Road rightof-wayc. Map and letters detailing utility locations before and after development in andalong the County RoadLarimer County Rural Area Road Standards Page 10-9October 22, 2007
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LARIMER COUNTYRURAL AREA ROAD STAND
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Table of Contents3.3.11 Typical Str
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Table of ContentsCHAPTER 8 - ENVIRO
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Table of Contents12.3.7.2 Conventio
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Table of ContentsG.7.12 Other Permi
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Chapter 1 - General InformationSect
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Chapter 1 - General InformationSect
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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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Page 57 and 58: 9.1.3 DefinitionsChapter 9 - Roadwa
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Page 71 and 72: CHAPTER 11 - ACCESS AND UTILITY PER
Page 73 and 74: Chapter 12 - Right of Way Permittin
Page 93 and 94: Appendix A - Definitions and Abbrev
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Page 97 and 98: APPENDIX B - REFERENCES AND RESOURC
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Page 112 and 113: 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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