Type of Street
| |||||
---|---|---|---|---|---|
Description
|
Arterial
|
Collector
|
Minor
|
Private Way
|
Industrial/ Commercial
|
Minimum right-of- way width (feet)
|
80
|
50
|
50
|
50
|
80
|
Minimum pavement width (feet)
|
44
|
24
|
202
|
121
|
44
|
Minimum grade
|
.5%
|
.5%
|
.5%
|
N/A
|
5%
|
Maximum grade
|
5%
|
6%
|
6%
|
10%
|
5
|
Minimum centerline radius (feet)
|
800
|
230
|
150
|
N/A
|
800
|
Minimum tangent between curves of reverse
alignment (feet)
|
300
|
200
|
100
|
N/A
|
300
|
Roadway crown (inches)
|
1/4/ft.
|
1/4/ft.
|
1/4/ft.
|
N/A
|
1/4/ft.
|
Minimum angle of street intersections
|
90°
|
90°
|
90°
|
90°
|
90°
|
Maximum grade within 75 feet of intersection
|
2%
|
2%
|
2%
|
N/A
|
2%
|
Minimum curb at intersection (feet)
|
30
|
20
|
15
|
N/A
|
30
|
Minimum right-of- way radii at intersections
(feet)
|
20
|
10
|
10
|
10
|
20
|
Minimum width of shoulders, each side
(feet)
|
3
|
3
|
3
|
3
|
9
|
NOTES:
|
---|
1Pavement requirement for a private
way in a minor subdivision may be at the Board's discretion.
|
2Pavement requirement for a minor
subdivision street may be at the Board's discretion.
|
Posted speed limit (mph)
|
25
|
30
|
35
|
40
|
45
|
50
|
55
|
Sight distance (feet)
|
250
|
300
|
350
|
400
|
450
|
500
|
550
|
Type of Street
| |||||
---|---|---|---|---|---|
Minimum Requirements
| |||||
Street
|
Arterial
|
Collector
|
Minor
|
Private Way
|
Industrial/ Commercial
|
Aggregate subbase course (inches) (maximum
sized stone 4 inches)
|
18
|
18
|
18
|
12
|
18
|
Crushed aggregate base course (inches)
|
4
|
3
|
3
|
3
|
4
|
Hot bituminous pavement (inches)
| |||||
Total thickness
|
3 1/4
|
2 1/2
|
2 1/21
|
3
| |
Surface course
|
1 1/2
|
3/4
|
3/41
|
1 1/4
| |
Base course
|
1 3/4
|
1 3/4
|
1 3/41
|
1 3/4
|
NOTES:
|
1Pavement requirement for a minor
subdivision street may be at the Board's discretion.
|
Sieve Designation
|
Percentage by Weight Passing Square Mesh
Sieves
| |
---|---|---|
1/4-inch
|
25% to 70%
| |
No. 40
|
0% to 30%
| |
No. 200
|
0% to 7%
|
Sieve Designation
|
Percentage by Weight Passing Square Mesh
Sieves
| |
---|---|---|
1/2-inch
|
45% to 70%
| |
1/4-inch
|
30% to 55%
| |
No. 40
|
0% to 20%
| |
No. 200
|
0% to 5%
|