§ SR-19. Streets.

A. 

General. Streets shall be of sufficient width, suitably located, related to the topography, adequately constructed to accommodate the prospective traffic and afford access of fire-fighting, snow removal and other road maintenance equipment and shall be coordinated to compose a convenient system. The arrangement of streets shall be such as to cause no undue hardship to adjoining properties.

B. 

Continuation of existing streets. The arrangement of streets in the subdivision shall provide for the continuation of principal streets of adjoining subdivisions and for proper projection of principal streets into adjoining properties which are not yet subdivided in order to make possible necessary fire protection, movement of traffic and the construction or extension, presently or when later required, of needed utilities and public services such as sewers, water and drainage facilities. Where the topographic or other conditions make such continuance impractical, in the opinion of the Planning Board, the above requirement may be modified.

C. 

Cul-de-sac streets. Cul-de-sac streets generally are not desirable unless it is clear that through traffic on such street is not essential to the street system. Where cul-de-sac streets are included in a subdivision, they generally shall not exceed 400 feet in length and shall terminate in a circular turnaround having a minimum right-of-way radius of 50 feet.

D. 

Street alignment. Horizontal and vertical alignment of streets shall provide for adequate safety of vehicular and pedestrian traffic.

(1) 

Site distance requirements shall be governed by the recommended speed for the particular street. The topography of the site should be a controlling factor in the design, preserving the natural features of the terrain where at all possible. Generally, on minor streets, the horizontal and vertical curves shall be designed to provide 200 feet of sight distance.

(2) 

Grades of all streets shall conform to the terrain but shall not be less than 0.5% nor more than 5% on collection streets and 10% on minor streets.

E. 

Street intersections. Four-cornered intersections shall be avoided where possible, except when it provides for a more logical flow of traffic to collector streets and major highways. Grades within the intersection shall be restricted to a maximum of 2.5%. The angle of intersection shall be as near 90° as possible.

F. 

Street widths. Right-of-way widths will be a minimum of 50 feet for all streets. Major streets may require up to 70 feet, to be determined by the Planning Board. Pavements will be a minimum of 34 feet unless in an A Residence District, A-1, A-2, A-5 or A-10 Residence District, and, in the opinion of the Planning Board, the density of the development and the character of the site would warrant the use of narrower pavement on minor streets only. Pavements wider than 34 feet will be required on all major streets.

G. 

Underground electrical and telephone wires.

(1) 

Electric distribution and telephone subscriber wires shall be installed underground, except that the Planning Board may waive this requirement at the request of the applicant in cases where the Board shall determine that the installation of underground service will result in practical difficulty or hardship. In making such determination, the Planning Board shall take into account the following:

(a) 

The size and nature of the subdivision.

(b) 

Unusual topographic or other natural conditions.

(c) 

The type of service existing in the area adjacent to the subdivision at the time of application for waiver.

(2) 

The Planning Board may grant a full or partial waiver of this requirement and, in approving such waiver, shall alternatively require the installation of electric and telephone wires on poles within the street right-of-way or along the rear property line as conditions warrant, or may require a combination of underground and overhead service.