§ 801-26. Streets.

A. 

Location of streets.

(1) 

The streets shall be designed and located so as, in the opinion of the Board, to be continuous and in alignment with existing streets; to provide adequate access to all lots in the subdivision; by streets that are safe and convenient for travel; to lessen congestion in such streets and adjacent public streets; to reduce danger from the operation of motor vehicles; to secure safety in case of fire, flood, panic and other emergency; to insure compliance with applicable Zoning Ordinance; to secure adequate provision for proper drainage and water, sewers and other utilities; and to coordinate the streets in the subdivision with each other and with the existing street system of the Town, and the streets in neighboring subdivisions.

(2) 

The proposed streets shall be designed and located so as to conform to the Master Plan, if any, as adopted in whole or in part by the Board.

(3) 

Provision satisfactory to the Board shall be made for the proper projection of streets, or for access to adjoining property that is not yet subdivided.

(4) 

Due consideration will be given by the Board to the attractiveness of the layout and to the conformance of the ways to the topography. Streets shall be laid out with curvilinear lines wherever possible.

(5) 

Reserve strips prohibiting access to streets or adjoining property shall not be permitted, except where, in the opinion of the Board, such strips shall be in the public interest.

(6) 

Where ways are extended to the property line forming stub streets for future tie, that way shall be paved to the property line.

(7) 

Subdivisions shall be designed so as to minimize the length of roads.

(8) 

Road layouts shall be located and designed so as to create easily accessed lots at or near grade level.

(9) 

Subdivisions shall be designed so as to avoid creating lots with double frontage, except when one frontage is on a major street.

(10) 

Where a subdivision borders on a major street, access to lots shall be provided from a parallel local street and access to the major road shall be minimized.

(11) 

No road, with or without fill, shall be located within a velocity zone or within the one-hundred-year floodplain, as shown on the special Flood Insurance Rate Maps, and as further defined by the topographic information shown on the plan.

(12) 

Where access to a subdivision crosses land in another municipality, the Board may require certification, from appropriate authorities, that such access is in accordance with the Master Plan and subdivision requirements of such municipality and that a legally adequate performance bond has been duly posted or that such access is adequately improved to handle prospective traffic.

B. 

Width, alignment and grades of streets.

(1) 

The criteria contained in the Appendix, Design Standards, Typical Road Cross Section, and Guard Rail Warrant, shall be observed in the design of streets.

Editor's Note: These items are included at the end of this chapter.

(2) 

Streets shall intersect with minimum center-line offsets of 150 feet unless otherwise specified by the Board.

(3) 

Streets shall be laid out so as to intersect as nearly as possible at right angles. No street shall intersect any other street at less than 75°.

(4) 

Where the angle of intersection between two streets varies more than 10° from a right angle, the radius of the curve at the curbline at the obtuse angle shall be less and at the acute angle shall be correspondingly greater than the radius specified in the Appendix to the extent approved or required by the Board.

(5) 

All changes in grade exceeding 2% shall be connected by vertical curves of the length indicated in the design standards table in these regulations.

(6) 

No center-line gradient is to exceed 6% on any curve except when the curve is superelevated and the design is acceptable to the Board's engineer. All curves on a major road shall be superelevated in conformance with AASHTO Guidelines unless otherwise approved by the Planning Board's engineer. Superelevations shall not exceed E = 0.06.

(7) 

No center-line gradient is to exceed 6% within 500 feet of a dead-end.

(8) 

No street shall intersect another street at a gradient in excess of 2% for a distance of at least 40 feet from the intersection as measured from the edge of the right-of-way.

(9) 

Way lines shall be parallel unless otherwise specified by the Planning Board.

(10) 

Streets shall be designed in accordance with AASHTO Standards unless otherwise specified.

C. 

Dead-end streets.

(1) 

Dead-end streets shall be not less than 100 feet long nor more than 750 feet. The length of the dead-end street shall be measured from the intersection with a street providing alternative access, to the beginning of the cul-de-sac or turnaround T. The Board may grant a waiver from the maximum length of the dead-end street if the Board determines that there is a reasonable expectation that the street will become an additional means of access or egress to a future street connection on adjacent, undeveloped land. No extension of a cul-de-sac or turnaround T to adjacent land shall be permitted where such extension will lengthen a dead-end street beyond the seven-hundred-fifty-foot maximum length.

(2) 

Minor and secondary dead-end residential streets shall be provided at the closed end with a turnaround having an outside paved roadway diameter of 90 feet and a right-of-way diameter of 105 feet.

(3) 

No major dead-end street and secondary nonresidential dead-end street shall be permitted, unless the Fire Department, DPW, and/or Police Department provide the Board with written determination that there will be no compromise to public safety of both pedestrian and vehicular traffic. Where the Board grants a waiver to allow a dead-end street, the street shall be provided at the closed end with a turnaround having an outside paved roadway diameter of not less than 94 feet, 30 feet of the pavement width on the cul-de-sac and with a right-of-way diameter of at least 110 feet. culs-de-sac shall be shaped in accordance with ASHTO standards for circular and circular offset culs-de-sac for single-unit trucks.

(4) 

Dead-end streets shall be constructed all the way to the property line and shall be designed and located so as to allow them to continue to abutting property.

(5) 

A minor road serving less than 10 lots may be constructed with a turnaround T or Y in lieu of a cul-de-sac at the discretion of the Planning Board. The turnaround T shall be designed according to the drawings in the appendix entitled "Paved Turnaround T" or shall be an alternative design approved by the Planning Board.

(6) 

Natural vegetation shall be retained in the center of the turnaround. Damaged areas shall be replanted with a combination of ground cover, shrubs and/or trees common to the Cape such as: bearberry, bayberry, inkberry, American holly, beach grape; Rugosa rose, beach gum, red cedar, juniper, red oak, thornless honey locust, American red maple, checkerberry, Shore juniper or sargent juniper, unless otherwise approved by the Planning Board.

(7) 

Upon construction of an extension of a dead-end street, the easement for the existing turnaround shall terminate in accordance with the provisions of Chapter 41 of the General Laws. The paved surface of the turnaround shall be removed so as to create a roadway of a uniform width. Drainage, road surface and road shoulders shall be repaired and/or reconstructed and revegetated in accordance with all the requirements of the Subdivision Rules and Regulations.

D. 

Clearance above roads. Overhanging vegetation shall be cleared to a height of 15 feet above roads, to provide clearance for trucks including Fire Department ladder trucks.