Design & Construction Specifications - Town of Kernersville

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4) Parkway/Boulevard cross sections will be approved by the Public Works Director taken in to consideration; use ofproposed roadway, anticipated ADT, adjoining property uses, thoroughfare/collector systems and adjoining street types.5) Utilities will not be permitted under the pavement except, alleys, perpendicular crossings and specific approval by thePublic Works Director6) Median divided streets shall have a minimum travel lane of 12’ with 8’ of formal parking excluding the concrete gutter.7) Short Neighborhood Loop Streets and Cul-de-Sacs less than 600’ may be constructed to a width of 26’ FF or VV.Stopping Sight Distances - Minimum-stopping distances should conform to thedesign speed for the particular street and the stopping distances required for wetpavement conditions, as follows:20 mph 125 feet25 mph 150 feet30 mph 200 feetThese sight distances should be provided by both vertical and horizontalalignment. Where grades vary from level conditions, stopping sight distances canbe decreased for uphill grades and must be increased for downhill grades.Vertical Curve Design – K values for vertical curve design should be consistentwith design speed. Maximum centerline grades should also be consistent withdesign standards.Centerline Radii – The criteria for minimum centerline radius for design speedsof 25 mph and less (no superelevation) are:20 mph 90 feet25 mph 175 feetCurb Radii – For design speeds of 25 mph or less the minimum criteria for curbradius is 25 feet. On street parking may be restricted 50 feet back from theintersection on each street.Intersection sight triangles – The minimum sight triangle for stop conditions atstreet intersections shall be 70 feet along the major road right of way and 10 feetalong the minor road right of way. The intersection sight triangle shall bepermanent sight easement.Curb construction. All curbed streets shall be built in accordance with NCDOTrequirements for vertical curb and gutter and valley type construction.Pavement Design – All public streets shall meet the pavement design criteriaestablished in the “Design Standards Section” of this manual.
Sidewalks and Pedestrians – Minimum width for a sidewalk is 5 feet.Sidewalks, which directly abut curbing, shall be a minimum of 6 feet. Sidewalksneed an additional 2 feet of width if they directly abut fences, walls, buildings orother vertical structures. Within commercial areas and places with highpedestrian volumes, sidewalks should be sized and surfaced appropriately foranticipated pedestrian traffic volumes and to meet or exceed ADA guidelines.Bicyclists – On lower volume streets bicyclists should be considered a normalpart of the vehicle mix on the street. On higher volume streets bicyclists shouldbe accommodated with 6 feet wide bike lanes, but separate routes for lessexperienced bicyclists may be considered as well. Routing bicyclists within andthrough TNDs may include signage and striping, including changing the color ofthe entire bike lane, as appropriate.Transit – TND design should be inherently compatible with transit. Transit shouldbe addressed wherever it is present and should be appropriately planned whereit may not yet exist. Transit services are typically provided within core areas andalong avenues, main streets and higher-capacity roads. Due to size andinterconnected street pattern, residents often do not need to walk more than ¼mile to the nearest transit stop.On-street Parking – “Informal Parking” refers to parking that is allowed alongstreets, but is not designated or marked as parking areas. “Formal Parking”refers to parking that is allowed along streets that is designated or marked, butnot necessarily stripped as such. Formal Parking on Commercial or highervolume streets may require stripping.Planting Strips and Street Trees – Planting strips, located between the curband sidewalk parallel with the street, shall be 8 feet or more in width. To maintainsight lines, trees and other objects are prohibited in the site distance areasillustrated in figures 1-5 of the design standard section of this manual.If trees or plantings are placed in the right-of-way, the property ownersassociation covenants shall include language which outlines how and when thetrees or plantings will be maintained. Tree types placed within the right-of waymust be approved by the Public Works Department. The developer and/orproperty owners association must keep the trees trimmed on the road side tomaintain a clear distance from the pavement to a distance 10-feet above thepavement. Approval shall be based on the assurance that the property ownersassociation covenants clearly state how the trees and plantings within the rightof-waywill be adequately and routinely maintained and replaced if needed.
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TOWN OF KERNERSVILLEDESIGN AND CONS
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TABLE OF CONTENTSITEMPAGE NUMBERDef
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Drainage Maintenance Easement - A p
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Stabilizing Vegetation - Any vegeta
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Thoroughfare, Major - A public stre
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STREETDESIGN STANDARDSGENERAL:For a
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the Public Works Department, and al
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Private StreetAlthough not encourag
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C. Horizontal Street DesignAlignmen
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practical. The vertical curve contr
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G. BridgeStructures, which are to s
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A. Intersection Sight DistanceIn or
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Operating Speed(MPH)Table 3.2Minimu
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60 650Source: AASHTO Green Book, 19
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Design CriteriaRoadway Design Table
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10. Maximum storm drainage pipe gra
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) Contact person and phone numberc)
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C. Revisions to Approved Plans:1. A
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Design Drawing RequirementsPlans su
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_____ 22. Match lines between sheet
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CONSTRUCTION/INSPECTION STANDARDSGE
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ase placement, another proof roll m
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9. Place stone base for curb and gu
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2. Storm Drainage - A watertight sy
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2. Authoritya. The CSS has all the
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3. Limitationsa. The Inspector may
Page 59 and 60: (c)(d)of Aldermen, the Ordinance(s)
Page 61: STANDARD DRAWINGSTABLE OF CONTENTSI
Page 83 and 84: TOWN OF KERNERSVILLEDEPARTMENT OF P
Page 85 and 86: B. CONSTRUCTION REQUIREMENTS:1. The
Page 87 and 88: DATE:______________________________
Page 89 and 90: Town of KernersvillePublic Works De
Page 91 and 92: Watershed Permit Application - Low
Page 93 and 94: Watershed Permit - High DensitySite
Page 95 and 96: NORTH CAROLINA )) DEED OF EASEMENTF
Page 97 and 98: STATE OF NORTH CAROLINACOUNTY OF FO
Page 99 and 100: STATE OF NORTH CAROLINA )COUNTY OF
Page 101 and 102: forth in Exhibit B attached and any
Page 103 and 104: Notary PublicEXHIBIT APROPERTY DESC
Page 105 and 106: PROCEDURE FOR BONDING IMPROVEMENTSB
Page 107 and 108: PROCEDURE FOR THE COMPLETIONof“PR
Page 109: SECTION 2DESIGN GUIDELINES.Relation
Page 113: Highways and Large Through Corridor
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Design & Construction Specifications - Town of Kernersville

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