[Amended 6-23-2009; 4-26-2016]
The following classes of streets are established for planning and design purposes. The Planning Board reserves the right to make the final decision regarding the classification of a street based on projected traffic volume and for reasons of public safety.
COLLECTOR STREET
A street that receives and distributes traffic to and from various sub-areas within a neighborhood or receives traffic from a given neighborhood and carries it to an arterial highway.
LOCAL STREET
A street used primarily for access to the abutting lots.
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 by the subdivider to the attractiveness of the street layout in order to obtain the maximum livability and amenity of the subdivision.
A. 
Design speeds. Radius of curves and length of vertical curves should be selected to provide safe sight distances (either passing or stopping) for the design speed of the road.
[Amended 5-2-2000]
B. 
Location and alignment.
(1) 
Master Plan. The proposed streets and off-street footpaths shall conform, so far as practicable, to the Master Plan as adopted in whole or in part by the Planning Board.
(2) 
Projections. Provision satisfactory to the Planning Board shall be made for the proper projection of streets for access to adjoining property that is not yet subdivided, or for connection with future streets.
(3) 
Reserve strips. 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.
(4) 
Jogs. Street jogs with center-line offsets of less than 125 feet shall be avoided.
(5) 
Curves. The minimum center-line radii of curved streets shall be 200 feet for collector streets and 100 feet for local streets.
(6) 
Intersections. Streets shall be laid out so to intersect as nearly as possible at right angles. No street shall intersect any other street at less than 80°.
(7) 
Fillets. Property lines at intersections shall be rounded or cut back to provide for a minimum radius at the edge of the pavement of 40 feet. The distance between the edge of the pavement and the property line shall not be less than 15 feet for collector streets and 12 feet for local streets.
(8) 
No exit streets.
[Amended 4-30-2002]
(a) 
No exit streets shall not be designed or intended to serve more than eight lots or dwelling units. Streets which may be extended by the action of others so as to be through streets may be considered by the Board after reviewing the nature of the adjoining land and other local conditions. In no case shall a no exit street exceed 800 feet measured from the center of an intersection with another street except as allowed by the Board for Flexible Residential Development (§ 185-23).
[Amended 6-23-2009]
(b) 
No exit streets shall be provided at the closed end with a turnaround having an outside roadway diameter of at least 100 feet.
(9) 
Bridges. New bridges shall be constructed in such manner as to comply with plans and specifications as shall be in accordance with MGL c. 85, § 35, for bridges on public highways and shall be approved by the Massachusetts Department of Transportation.
[Amended 4-26-2016]
(a) 
Culverts in accordance with Massachusetts River and Stream Crossing Standards.
A. 
Right-of-way widths. The minimum width of street rights-of-way shall be as follows: collector street: 60 feet; local street: 50 feet. Greater width shall be required by the Board when deemed necessary for present and future vehicular travel.
[Amended 5-2-2000]
B. 
No exit streets.
[Amended 4-30-2002]
(1) 
No exit streets shall terminate in circles having a right-of-way diameter of not less than 120 feet. Where a future street is projected beyond the circle, the circle shall be designed in such relation to the projection of the right-of-way that the additional land used for the circle may be relinquished to the adjacent properties at the time the road is constructed over the projected route.
(2) 
The ownership of the fee in land lying within the projection of any road shall remain with the adjacent properties until the road is constructed over the projected route. Any such fee shall not be included in determining the conformity of the area of any lot to the minimum requirements under Chapter 185, the Zoning Bylaw of the Town.[1]
[1]
Editor's Note: Former Subsection C, which immediately followed and dictated which parts of a circle are part of the right-of-way, was repealed 4-26-2016.
A. 
Longitudinal grades. Grades of streets shall not be less than 1%. Grades of collector streets shall not exceed 8% on straightaways or 6% on curves and of local streets 8% on straightaways or 6% on curves.
B. 
Superelevation. Where curves and grades combine to create potentially dangerous driving conditions, the Board may require a suitable amount of superelevation of the curves or other protection.
C. 
Intersections. Where streets intersect within a subdivision or with local streets there shall be a minimum of 100 feet of two-percent or less grade before the intersections; where subdivision streets intersect with collector streets there shall be a minimum of 150 feet of two-percent or less grade.
A. 
Utility easements. Easements for utilities across lots or centered on rear or side lot lines shall be provided where necessary and shall be at least 20 feet wide for a single utility and 30 feet wide for a multiple utilities.
[Amended 4-26-2016]
B. 
Drainage easements. Where a subdivision is traversed by a watercourse, drainageway, channel or stream, the Planning Board may require that there be provided a stormwater easement or drainage right-of-way of adequate width to conform substantially to the lines of such watercourse, drainageway, channel or stream, and provide for construction or other necessary purposes. The minimum width of any such easement shall be 20 feet. Where necessary, drainage easements on adjoining property shall be secured for the benefit of the Town.
C. 
Access easements. Access easements to park and conservation land shall be secured for the benefit of the Town and shall be 20 feet in width.
D. 
Footpath easements. Easements for off-street footpaths shall be 20 feet in width.
[Amended 5-2-2000]
Before approval of a plan the Planning Board shall 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 approval for a period of three years. A suggested formula is 10% of the total land area, not including wetlands. For the purposes of these regulations, open space is land that is usable for passive or active recreational activities, but not including wetlands, water bodies, slopes in excess of 25% or land devoted to buildings, impervious surfaces, roads and/or other development.