(a) General Planning Standards.
(1) The arrangement, character, extent, width, grade, and location of all streets shall conform to the Comprehensive Plan and shall be considered in relation to existing and planned streets, to topographic conditions, to public convenience and safety, and in their appropriate relation to the proposed uses of the land to be served by such streets.
(2) Where such is not shown in the Comprehensive Plan, the arrangements of streets in a subdivision shall either provide for the continuation of appropriate projection of existing principal streets in surrounding areas; or conform to a plan for the neighborhood approved or adopted by the Planning Commission to meet a particular situation where topographical or other conditions make continuance or conformance to existing streets impracticable.
(3) Minor streets shall be so laid out that their use by through traffic will be discouraged .
(4) Where a subdivision abuts or contains an existing or proposed arterial street, the Planning Commission may require marginal access streets, reverse frontage with a reserve (buffer) strip contained in a non-access reservation between the street right of way and rear property lot line, or such other treatment as may be necessary for adequate protection of residential properties and to afford separation of through and local traffic.
(5) Where a subdivision borders on or contains a railroad right-of-way or limited access highway right-of-way, the Planning Commission may require a street approximately parallel to and on each side of such right-of- way, at a distance suitable for the appropriate use of the intervening land such as for park purposes in appropriate districts. Such distances shall be determined with due regard for the requirements of approach grades and future grade separations.
(6) Reserve strips, controlling access to streets, shall be prohibited, except where their control is placed with the Town under conditions approved by the Planning Commission.
(7) Intersections of minor streets with arterial or collector streets shall be held to a minimum to avoid hazard and delay.
(8) Half streets shall be prohibited, except where it is necessary to provide the remaining half of a previously approved half street.
(9) No duplicate street names shall be used, which in the opinion of the Planning Commission will be confused with the names of existing streets. Streets that are extensions of or in alignment with existing named streets shall bear the names of the existing streets.
(10) Where the subdivision abuts or fronts on arterial streets, sidewalks shall be required, and shall be of size and type as approved by the Planning Commission.
(11) No dead-end streets shall be permitted without a suitable turn-around. Dead-end streets extending to tract boundary lines, which are intended to connect to future streets in adjoining tracts and dead-end streets within a tract which are to be extended, shall be provided with a temporary turn- around. Appropriate arrangements shall be made for those portions of temporary turn-arounds outside of street right-of-way to revert to abutting property owners at such time as streets shall be extended.
(12) When continuing street lines (projected right-of-way tangents) deflect from each other at any one point by more than ten degrees, they shall be connected by a curve, with a radius at the inner street right-of-way line not less than 350 feet; where continuous street lines of arterial streets deflect more than five degrees from each other, they shall be connected by a curve of not less than 800 feet radius.
(13) Where street grades exceed five percent (5%), gutters shall be paved.
(14) Minor streets leading from the same subdivision shall not intersect on the same side of a major thoroughfare at intervals of less than 800 feet.
(15) Radius corners or diagonal cut-offs shall be provided on the property line substantially concentric with or parallel to the chord of the curb radius corners.
(16) Where any street intersection will involve topographic features or existing vegetation inside any lot corner that might create a traffic hazard through limiting visibility, such ground and/or vegetation shall be cut and kept cut to a height not exceeding three and one-half feet in conjunction with the grading of the public right-of-way to the extent deemed necessary to provide adequate sight distance and a vision clearance within the triangle formed as provided by Section 1333.17
.
(17) Service drives.
A. Service drives may be provided in residential, commercial, and industrial districts as private access ways.
B. Service drive intersections and sharp changes in alignment shall be avoided, but where necessary, corners shall be cut off sufficiently to permit safe vehicular movements.
C. Dead-end service drives shall be avoided when possible, but if unavoidable, shall be provided with adequate turnaround facilities at the dead-end as determined by the Planning Commission.
(b) Design Standards.
Local Roads | ||||||
Major Arterial and Primary | Collector or Secondary | Minor | Marginal Access | Cul-de-sac | Service Drive | |
Minimum Right-of-way Width | As determined by the State Road Commission | 60' | 50' | 50' | (Turnaround 50' radius) 50' | 20' |
Pavement Width | As determined by the State Road Commission | 36' | 28' | 22' | 28' | 18' |
Maximum grade | 3% | 8% | 12% | 12% | 12% | 10% |
(16% may be permitted on short terms) | ||||||
Local Roads | ||||||
Major Arterial and Primary | Collector or Secondary | Minor | Marginal Access | Cul-de-sac | Service Drive | |
Minimum Grade | 1.0% | 1.0% | 1.0% | 1.0% | 1.0% | 1% |
Minimum Center Line Radius of Curves | 500' | 300' | 100' | 300' | 100' | |
Minimum length of vertical curves | 500' | 200' | 150' | 150' | 150' | 75' |
(But not less than 25' for each % algebraic difference of grade) | (But not less than 15' for each % algebraic difference at grade | |||||
Minimum Curb Radii corner | 30' | 30' | 20' | 20' | 20' | |
Minimum Tangent Length Between Reverse Curves | 200' | 100' | ||||
Maximum Grades within 150' of Centerline Intersections | 1.5% | 3% | 3% | 3% | 3% | 3% |
Minimum Braking Sight Distance | 300' | 200' | 100' | 100' | 100' | 100' |
Minimum Distance between Centerlines at Street Jogs | 400' | 150' | 150' | 150' | 150' | |
Local Roads
Major Arterial and Primary
Collector or
Secondary
Minor
Marginal Access
Cul-de-sac
Service Drive
Maximum Length of
Cul-de-sac
800'
Minimum outside Radius of Cul-de-sac pavement
46'
Angle at
Intersections of Street
Centerlines
90°
80-100°
80-100°
80-100°
80-100°
No Standard
Grades under 1.0% acceptable when approved storm water drainage facilities are provided.
Except where in the judgment of the Planning Commission, the cul-de-sac does not impose any problem and contributes
a positive design feature.