Code of Massachusetts Regulations
974 CMR - DEVENS ENTERPRISE COMMISSION
Title 974 CMR 2.00 - Subdivision
Section 2.07 - Street and Road Design Standards
Current through Register 1531, September 27, 2024
(1) Street and Road Layout and Construction.
(2) Design Standards by Street and Road Classification. All Design Standards apply to both streets and roads. In accordance with the Bylaws, all "streets" are Public Ways and "roads" are private ways. Table 1 lists the Design Standards for streets and roads and indicates which classification is allowed to be public and/or private. In addition to Table 1, the following additional design standards also apply to the specified roads:
Attributes of neighborhood roads include:
TABLE 1: DESIGN STANDARDS BY STREET/ROAD CLASSIFICATION
Street/Road DESCRIPTION |
Road (ALLEY) |
NEIGHBORHOOD Road |
LOCAL Street/Ro ad |
MINOR COLLECTOR (Street) |
BOULEVARD (Street) |
MAJOR COLLECTOR (Street) |
REGULATION REFERENCE |
Design Speed Posted Speed |
10 MPH 5 MPH |
10 MPH 5 MPH |
30 MPH 25 MPH |
30 MPH 30 MPH |
30 MPH 25 MPH |
30 MPH 35 MPH |
AASHTO |
*Right-of-way Width |
18-20' |
12-28' |
40 ' typical |
55' typical |
75-80' typical |
66' typical |
AASHTO |
Travel Lane Width |
18' |
varies |
9' |
10'-12' |
10'-12' |
10'-12' |
MHD |
Paved Shoulder Width |
none |
none |
1' |
2'-3'** |
3'-6'** |
2'-4'** |
MHD |
Cross-sectional Slope |
2% |
2% |
2% |
2% |
2% |
2% |
AASHTO |
Cul-de-sac Outer Pavement Radius with Island |
N/A |
N/A |
45' |
45' |
N/A |
45' |
AASHTO |
Profile Grades -Maximum |
5% |
5% |
10% |
5% |
8% |
5% |
MHD |
Profile Grades -Minimum |
0.75% |
0.75% |
1% |
1% |
0.75% |
1% |
AASHTO |
Centerline-to-Centerline Intersection Spacing |
Min. 310' |
Min. 310' |
Min. 310' Max.800' |
Min. 400' Max 800' |
Min. 310' |
Min. 600' |
|
Curb Radius at Intersection |
>= 25' |
>= 25' |
> 25' |
> 30' |
>= 25' |
>= 30' |
AASHTO |
Intersection Grades |
3% |
3% |
<2% |
<2% |
< 3% |
<2% |
AASHTO |
Intersection Sight Distances |
>= 310' |
>= 310' |
>= 310' |
>= 310' |
>= 310' |
>= 310' |
AASHTO |
Reverse Curve Separation |
N/A |
N/A |
> 100' |
> 150' |
>= 100' |
> 150' |
|
Centerline Radius |
N/A |
N/A |
> 150' |
> 275' |
>= 215' |
> 320' |
|
Watermain -Class 52 Cement Lined Ductile Iron Pipe |
>= 8" |
>= 8" |
> 8" min. |
> 8" min. |
>= 8" min |
> 8" min |
|
Hydrant Spacing |
N/A |
500' max |
500' max. |
500'max. |
500' max. |
< 500' max. |
|
Sewer Main -SDR 35 PVC (gravity system) |
>= 8" |
>= 8" |
> 8" |
> 8" |
>= 8" |
> 8" |
|
Curbing - Sloped Granite (SG), or Cement Concrete |
N/A |
N/A |
Cape Cod berm |
SG: 6" reveal or Cape Cod berm |
SG: 6" reveal or Cape Cod berm Reverse curb option |
SG: 6" reveal |
974 CMR 2.07(5) and MHD |
Curbing -Vertical Granite (VG), or cement concrete |
N/A |
N/A |
Cape Cod berm |
VG: 6" reveal |
VG: 6" reveal |
VG: 6" reveal |
974 CMR 2.07(5) and MHD |
Street lighting Maximum Height: Maximum Spacing: |
18' 50' |
18' 50' |
18' 50' |
30' 75' |
35' 75' |
35' 75' |
974 CMR 2.07(6) |
Gravel Sub-base - MHD M.1.03.1Typ A |
varies |
varies |
8" |
8" |
8" |
8" |
974 CMR 4.08(5) for pervious |
Gravel Base -MHD M.1.03.0. Typ B |
varies |
varies |
4" |
4" |
4" |
4" |
974 CMR 4.08(5) for pervious |
Bituminous Concrete Base Course |
varies |
varies |
N/A |
N/A |
2" |
3" |
974 CMR 4.08(5) for pervious |
Bituminous Concrete Binder Course |
varies |
varies |
2" |
21/2" |
11/2" |
11/2" |
974 CMR 4.08(5) for pervious |
Bituminous Concrete Top Course |
varies |
1.5" |
1.5" |
1.5" |
1.5" |
1.5" |
974 CMR 4.08(5) for pervious |
Bituminous Concrete Sidewalks (Concrete required where matching existing concrete sidewalks) |
N/A |
N/A |
Two sides 5' wide |
BCS/VGII/Ra il Related: One Side 5' wide. All Others: Two Sides 5' wide |
Two sides 5 ' wide |
BCS/VGII/Rai l Related: One Side 5' wide. All Others: Two Sides 5' wide |
|
Planting Strips |
N/A |
N/A |
3.5' wide min. |
3.5' wide min |
6' wide min. |
6' wide min. |
|
Vertical Clearances (Bridges) |
N/A |
N/A |
14.5 ' |
14.5 ' |
14.5 ' |
14.5 ' |
MHD |
* Right-of-way refers to total area of streets and roads including travelway, shoulders, sidewalks, planting strips and any improved areas beyond.
(3) Traffic Calming Measures. Traffic calming measures shall be integrated into all existing and proposed street and/or road designs where feasible to improve public safety and facilitate Universal Design that results in a safe multi-modal street and/or road network throughout Devens. Traffic calming measures include, but are not limited to, the following:
? Street trees every 30'
? Bump-outs/curb extensions
? Pinch points
? Lane offsets/shifts in pavement
? Pavement narrowing (chokers)
? Change in paving materials
? Traffic diverters/barriers
? Speed humps
? Forced turns/intersection islands
? Traffic Circle
? Street and/or road closures
? Raised intersections
? Signalized/raised vrosswalks
? Site furniture/bike racks for intersections adjacent to open space
The DEC will consider other traffic calming measures on a case-by-case basis. Refer to MassDOT, Highway Division, Project Development & Design Guide, 2006 (MHD) for details.
(4) Street and Road Edge Standards.
(5) Intersection Design Standards. While vehicular traffic flow should be carefully considered, creating safe crossings and accommodating pedestrians, vehicles and bicycles as much as possible in the Right-of-way takes precedence. Reasonable reduction of vehicular traffic capacities and level of service at intersections are justified when high volumes of pedestrians and bicyclists are present.
(6) Stormwater Management.
(7) Landscape Treatment within Street/Road Rights-of-way
Botanical Name |
Common Name |
Minimum Installed Size |
Maximum Spacing (on-center) |
Cornus sericea 'Kelseyi' |
Kelsey Dwarf Red Osier Dogwood |
12" - 15" |
18" o.c. |
Ilex verticillata 'Nana' |
Dwarf Winterberry |
18" - 24" |
2' o.c. |
Rhus aromatica 'Gro-low' |
Dwarf Fragrant Sumac |
15" - 18" |
18" o.c. |
Vaccinium angustifolium |
Lowbush Blueberry |
1 gal. |
2' o.c. |
In addition, the following list of non-native species may be used for bank stabilization, urban, and roadside conditions. Substitutions must be able to demonstrate suitability to the satisfaction of the DEC.
Botanical Name |
Common Name |
Minimum Installed Size |
Maximum Spacing (on-center) |
Cotoneaster horizontalis |
Rockspray |
18" - 24" |
2' o.c. |
Hedera helix 'Baltica' |
Baltic Ivy |
2 yr. |
8" o.c. |
Juniperus chinensis sargentii |
Sargent Juniper |
18" - 24" |
2' o.c. |
Juniperus horizontalis varieties |
Creeping Juniper |
18" - 24" |
2' o.c. |
Spiraea bumalda 'Anthony Waterer' |
Anthony Waterer Spirea |
18" - 24" |
2' o.c. |
Vinca minor |
Periwinkle |
2 yr. |
8" o.c. |
(8) Sidewalks.
(9) Lighting.
(10) Trails. When a portion of the public trail system or private connections to the public trail system as shown on the Devens Main Post Trails Report dated July 2001 falls within the land to be subdivided, the Applicant shall provide an Easement and construct that portion of the trail on the parcel/project site. The trail detail is shown as 974 CMR 3.08(12): FigureL. Depending on the size and use of a proposed subdivision, DEC may require connectors to the main trail system in addition to or in lieu of sidewalks.
(11) Transit Improvements Within Rights-of-ways. Where feasible, Applicants shall incorporate the following: