A. 
Location and alignment.
(1) 
All streets in the subdivision shall be designed so that, in the opinion of the Board, they will provide safe vehicular travel. Due consideration shall also be given to the attractiveness of the street layout in order to obtain the maximum livability and amenity of the subdivision.
(2) 
The proposed streets shall conform to any Master or Study Plan adopted in whole or in part by the Board.
(3) 
Streets shall be continuous and in alignment with existing streets, as far as practicable, and shall comprise a convenient system with connections adequate to insure free circulation of vehicular travel.
(4) 
If adjoining property is not subdivided but is, in the opinion of the Board, suitable for ultimate development, provision shall be made for proper projection of streets into such property by continuing appropriate streets within the subdivision to the exterior boundary thereof. Said projections shall be built to meet all the requirements as specified in Article 8, Required Improvements.
(5) 
Temporary dead-end streets, laid out to permit future projection, shall conform to the provisions of alignment, width, and grade that would be applicable to such streets if extended.
(6) 
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.
(7) 
Street jogs with center-line offsets of less than 125 feet should be avoided.
(8) 
The minimum center-line radii of curved streets shall be 100 feet. Greater radii may be required for principal streets.
(9) 
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 60°.
(10) 
Street lines at all intersections shall be rounded with a curve at each corner having a radius of not less than 25 feet. However, when the intersection of two streets varies more than 10° from a right angle, the radius of the curve at the obtuse angle may be less and at the acute angle shall be greater than 25 feet to the extent approved or required by the Board.
B. 
Width.
(1) 
The minimum width of street rights-of-way shall be 50 feet for principal streets and 40 feet for all other streets.
(2) 
Alleys with a minimum width of 20 feet may be required by the Board at the rear of any lots designated or zoned for nonresidential use.
C. 
Grade.
(1) 
Grades of all streets shall be the reasonable minimum, but shall not be less than 1.0%. Grades shall not be more than 6.0% for principal streets or more than 9.0% for other streets.
(2) 
Where the grade of any street at the approach to an intersection exceeds 6.0%, a leveling area shall be provided having not greater than a grade of 1.0% for a distance of 25 feet measured from the nearest exterior line of the intersecting street.
D. 
Dead-end streets.
(1) 
Dead-end streets, if approved by the Planning Board, permanently designed as such, shall not be longer than 500 feet unless, in the opinion of the Board, a greater length is necessitated by compelling evidence that the greater length is (a) necessary due to topography or other objective local conditions and (b) so designed as to achieve the public safety benefits of a street that is 500 feet or less in length.
(2) 
Dead-end streets, if approved by the Planning Board, permanently designed as such, shall be provided at the closed end with a turnaround having an outside property line diameter of at least 120 feet. Construction of an island within the turnaround is prohibited.
E. 
Adequate access from public way.
(1) 
A way providing access to streets within a subdivision shall be considered to provide adequate access if such access way complies with the subdivision regulations for pavement, width, and maximum grade applicable within a subdivision (hereinafter "access way").
(2) 
The Board may require, as a condition of its approval of a subdivision plan, that the developer construct or reconstruct an access way to comply with the subdivision regulations for pavement, width, and maximum grade applicable within a subdivision or compensate the Town for the cost of such improvement.
(3) 
Waivers. The Board may waive compliance with these access regulations upon a determination that the way in fact will be otherwise sufficient to serve the needs for access to potential uses of land abutting on or served by the way in question.
A. 
Easements for water mains and storm drains across lots or centered on rear or side lot lines shall be provided where necessary and shall be at least 20 feet wide.
B. 
Where a subdivision is traversed by a watercourse, drainageway, channel or stream, the Board may require that there be provided a stormwater or drainage easement of adequate width to conform substantially to the lines of such watercourse, drainageway, channel or stream, and to provide for construction of other necessary purposes.
C. 
Easements for underground electrical power, fire alarm or telephone lines across lots or centered on rear or side lot lines shall be provided as necessary. Such easements shall not be less than 10 feet in width.
D. 
Easements for installation and maintenance of distribution transformers, streetlight metering or switching services and the like shall be provided as required. Such easements shall be centered on lot lines and adjacent to street lines and shall provide at least four feet of working space around the installed equipment.
All lots shown on the plan shall comply with the requirements of the Zoning Bylaws of the Town of Lynnfield.[1]
[1]
Editor's Note: See Ch. 260, Zoning.
Before approval of a plan, the Board may also in proper cases require the plan to show a park or parks suitably located for playground or recreation purposes or for providing light and air. The park or parks shall not be unreasonable in area in relation to the land being subdivided and to the prospective uses of such land. The Board may, by appropriate endorsement on the plan, require that no building be erected upon such park or parks without its written approval.
A. 
Due regard shall be shown for all natural features, such as large trees, stonewalls, watercourses, scenic points, historic spots, and similar community assets, which, if preserved, will add attractiveness and value to the subdivision, or to the Town.
B. 
Special consideration shall be given to any Significant Tree, any tree with a DBH greater than 12 inches within the proposed right-of-way, easement areas, or on neighboring properties within 10 feet of the proposed right-of-way or easement areas, or located within a Woodland.
C. 
When certain trees meet many of the aforementioned considerations, the Board should request the applicant to preserve the tree if reasonably feasible. All trees to be preserved shall be well marked with signage and protected by the developer during construction. Protection measures for these trees shall be determined by the DPW Director/Tree Warden and the Board prior to construction following the guidelines established by the International Society of Arborculture, Best Management Practices, Managing Trees During Construction, 2nd edition. If the Planning Board permits the removal of a Significant Tree for the construction of the subdivision, the Board may require the applicant to replace or relocate said tree as deemed fit.
With the exception of fire alarm boxes, hydrants and streetlights, such items shall be painted a neutral green.