HomeMy WebLinkAboutSubdivison Regulations Appendix ASUBDIVISION REGULATIONS
801 Attachment 1
APPENDIX A
PLAN ELECTRONIC FILE REQUIREMENTS
File Format
Acceptable electronic file formats include AutoCad .dwg, AutoCad .dxf, or Microstation .dgn
format. Acceptable media formats include three-and-one-half-inch floppy disks, CD-ROM, or
Iomega Zip disks.
Coordinate System
For the purpose of accurately inputting the plan into the Town’s geographic information
system, the plan should be tied into the Massachusetts State Plane Coordinate System through
bounds with published coordinates (i.e., National Geodetic Survey, Mass Highway, etc.) where
feasible. The datum and units used shall be clearly shown. In cases where there are no suitable
geodetic bounds in the vicinity, the plan shall be tied into existing physical features such as
catch basins, manholes, utility poles, etc. In such cases, tie-ins to two or more physical features
shall be made for at least two different identifiable points on the plan (i.e. property corners).
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Design Standards
Type of
Street
Width of
Way
(feet)
Width of
Traveled
Way
(feet)
Design
Speed
(mph)
Minimum
Centerline
Radii
(feet)
Maximum
Centerline
Grade
Minimum
Centerline
Grade
Minimum
Curb
Radius at
Street
Intersect
(feet)
Minimum
Length or
Tangent
between
Reverse
Curves
(feet)
Storm
Frequency
for Drainage
Calculations
(year)
Stopping
Site
Distance**
(feet)
Major 60 28 50 600
minimum
800
desirable
5%1%50 300*50 475
Secondary 50 24 45 400
minimum
500
desirable
8%1%40 150 25 400
Minor A 50 20 35 150
minimum
200
desirable
10%1%30 100 25 250
Minor B 40 16 25 100 10%1%30 100 25 250
*Transition or minimum needed for superelevation.
**Sight distance shall be measured with an eye height of 3.5 feet and an object height of 0.5 feet above the pavement. Also see § 801-13 for site distance
required at intersections.
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