A. 
Location and alignment.
(1) 
All streets in the subdivision shall be designed so that they will provide safe vehicular traffic. Due consideration shall also be given by the subdivider to the attractiveness of the street layout in order to obtain maximum livability, safety and amenity of the subdivision.
(2) 
The proposed streets shall conform to the Comprehensive Plan and other Growth Management Plans adopted in whole or in part by the Board and/or the Town.
(3) 
Provision satisfactory to the Board shall be made for the proper projection of streets or for access to adjoining property which is not yet subdivided.
(4) 
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.
(5) 
Center-line offsets of street jogs with less than one hundred twenty-five (125) feet should be avoided. The Board may provide center-line offsets to be greater than one hundred twenty-five (125) feet, dependent on the categories of street and intersected street and the amount of anticipated traffic passing through the jog.
(6) 
The minimum center-line radii of curved streets shall not be less than the following:
(a) 
Lane; one hundred (100) feet,
(b) 
Minor street; one hundred fifty (150) feet,
(c) 
Collector street; five hundred (500) feet.
(7) 
Streets shall intersect at right angles unless it is in the public interest to have an intersection of less than ninety degrees (90°). No street shall intersect any other street at less than sixty degrees (60°).
(8) 
Property lines at street intersections shall be rounded or cut back to provide for a curb radius of not less than thirty (30) feet.
(9) 
The center-line distance between two (2) parallel streets on the same side of the intersected street shall be no less than three hundred fifty (350) feet, providing a minimum frontage for two (2) abutting house lots on the intersected street.
B. 
Width. The minimum width of street rights-of-way shall be forty (40) feet for a lane and fifty (50) feet for a minor or collector street. Greater width shall be required by the Board when deemed necessary for present and future vehicular travel. (For pavement width, see § 344-20H.)
C. 
Grade.
(1) 
Grades of streets shall not be less than five-tenths percent (0.5%). Grades shall not be more than six percent (6%) for collector streets, ten percent (10%) for minor streets and twelve percent (12%) for lanes.
(2) 
At an approach to an intersection a leveling area of a maximum of three percent (3%) shall be provided for a distance of at least seventy-five (75) feet measured from the nearest exterior line of the intersecting street.
(3) 
Vertical curves are required when algebraic difference in grade between center-line tangents is two and zero-tenths percent (2.0%) or more.
D. 
Sight distances. Forward sight distances shall not be less than one hundred fifty (150) feet on lanes, two hundred fifty (250) on minor streets or three hundred fifty (350) feet on collector streets.
E. 
Grading and location of pavements and utilities shall be as indicated on the typical street cross section.[1]
[1]
Editor's Note: A drawing depicting a typical street cross section is on file in the Planning Office and may be examined there during regular business hours.
F. 
Dead-end streets.
(1) 
A dead-end street is a continuous stretch of road open at one (1) end and closed at the other. For purposes of this section only, a street which connects only with a dead-end shall be deemed to be an extension of the dead-end.
(2) 
Dead-end streets and their extensions shall not be longer than eight hundred (800) feet.
(3) 
A dead-end street shall be measured from the nearest exterior line of the intersecting street to the furthest point of the right-of-way radius of the turnaround.
(4) 
Dead-end streets shall be provided at the closed end with a turnaround having a property line diameter of at least one hundred twenty (120) feet. An island shall be installed within the center of the cul-de-sac. The outside radius of this island shall be designed to accommodate the turning radius movement of a WB-40 vehicle (D.O.T.). Said island shall include on its outside radius a bituminous concrete berm of modified Cape Cod style or granite curbing.
G. 
Access. A subdivision with more than one (1) street greater than eight hundred (800) feet shall have a minimum of two (2) streets providing separate accesses into the subdivision.
H. 
Street names. Names of streets shall only be designated by letter on the preliminary plans, i.e., Road A, B, or C. Before the definitive plan is approved, or once the definitive plan is approved, but before it is signed, the developer/applicant shall select names for the streets from the Select Board-approved list of available street names, available in the Selectmen Office, and place said names on the plans.
[Amended 11-20-2019 STM, Art. 13]
A. 
Easements for utilities across lots or centered on rear or side lot lines shall be provided where necessary and shall be at least thirty (30) 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 a minimum of thirty (30) feet to conform substantially to the lines of such watercourse, drainageway channel or stream and to provide for construction or other necessary purposes.
C. 
Drainage easements outside of the area of the subdivision, but occasioned by it, may be required of the subdivider.
D. 
All easements shall be clearly shown on the definitive plan prior to approval.
" Drainage" shall mean the control of surface water within the tract of land to be subdivided.
A. 
Storm drains, culverts and related facilities shall be designed to permit the unimpeded flow of all natural watercourses, to ensure adequate drainage of all low points along streets, to control erosion and to intercept stormwater runoff along streets at intervals reasonably related to the extent and grade of the area drained and to meet best stormwater management practices as outlined in the Stormwater Policy and Technical Handbooks prepared by Massachusetts Department of Environmental Planning and Massachusetts Coastal Zone Management.
B. 
Storm sewers shall be based on a twenty-five-year storm frequency, cross culverts at a fifty-year storm frequency, culverts on a fifty-year storm frequency and detention areas at a one-hundred-year-storm frequency. In addition, compilations shall be made on two-, ten-, twenty-five- and fifty-year frequency storms for the contributing area of the detention area.
C. 
Design shall be based upon either the Rational Method or the Soil Conservation Method Modified Soil Complex as defined in the National Engineering Handbook, Section 4, Site Hydrology. The minimum water velocity shall be two (2) feet per second. The coefficient of runoff used shall be not less than three-tenths (0.3) for the subdivided areas. All developable land attributed to facilities being designed shall be assumed to be subdivided. A catchbasin-manhole system of drainage is required, with no storm sewers with an inside diameter of less than twelve (12) inches near the corners of intersectioning streets and at intervals of not more than three hundred (300) feet on continuous grades. Double catch basins are required at all low points in sag curves. Said double catch basins shall be constructed perpendicular to the roadway edge (berm/granite curbing). (See typical cross section in Appendix.)[1]
[1]
Editor's Note: A drawing depicting a typical street cross section is on file in the Planning Office and may be examined there during regular business hours.
D. 
The main drainage system shall be installed on the high side of the street.
E. 
Property shall be developed in such a manner as to maximize stormwater recharge on the site and to minimize direct overland runoff into adjoining lots, streets and watercourses. Peak flows and runoff at the boundaries of the subdivisions shall be no higher following development than before development. There shall be no volumetric increase or increase in peak runoff off the site. There will be no more increase of off-site drainage than existing off the site prior to disturbance of the total development site including both site drainage and roadway drainage.
F. 
Volumetric increases in runoff generated by the proposed development shall be handled as follows:
(1) 
The flow from storms having a twenty-five-year-storm frequency and twenty-four-hour duration shall be conveyed through the subdivision site in a manner which will maintain the ratio of runoff to infiltration at the same percentage as under normal conditions.
(2) 
Detention facilities shall be provided to handle all runoff which exceeds the percolation capacity of the site, up to and including the runoff generated by the one-hundred-year-storm frequency and twenty-four-hour duration.
A. 
No definitive plan shall be approved by the Planning Board unless evidence satisfactory to the Board is presented that adequate provision will be made for supply of water to each lot in the subdivision which is to be built upon.
B. 
System design shall be based upon the requirements of the Department of Public Works - Water and Sewer Division, and approved by said Department, in writing, prior to Planning Board approval of the definitive plan.
[Amended 10-18-2000 ATM, Art. 14]
Before approval of a plan by the Planning Board, said Board shall 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, and not unreasonable in area in relation to the area of land being subdivided and the prospective uses of such land, and if so determined, said Board shall, by appropriate endorsement on the plan, require that no building may be erected on such park or parks without its approval for a period of not more than three (3) years from acceptance of the last street in the subdivision by the Town.
Due regard shall be shown for all natural features, such as large trees, watercourses, scenic points, historic spots and similar community assets, which, if preserved, will add attractiveness and value to the subdivision.
No definitive plan shall be approved by the Planning Board unless evidence satisfactory to the Board is presented that adequate provisions have been made for underground cable utilities (e.g., to each lot in the subdivision which is to be built upon). All underground cables within the ways shall be contained within protective tubing, and handholes for replacement of the same shall be provided at appropriate intervals.