Type of Street
| |||
---|---|---|---|
Design Element
|
Arterial
|
Collector
|
Minor
|
Minimum right-of-way width
|
100 feet
|
80 feet
|
60 feet
|
Minimum pavement width
|
New York State
|
2x19 feet/38 feet
|
30 feet
|
Maximum grade
|
3%
|
5%
|
8%
|
Minimum grade
|
0.5%
|
0.5%
|
0.5%
|
Minimum radius of curves, inner street line
|
1000 feet
|
500 feet
|
300 feet
|
Minimum tangent length between reverse curves
|
200 feet
|
150 feet
|
100 feet
|
Maximum grade within 150 feet of center line
intersections
|
1%
|
3%
|
3%
|
Minimum braking sight distance
|
300 feet
|
250 feet
|
200 feet
|
Minimum distance between center line offsets
|
400 feet
|
250 feet
|
200 feet
|
Angle at intersections of center lines
|
90°
|
80° to 100°
|
80° to 100°
|
Traffic Intensity Design Index
| |||||
---|---|---|---|---|---|
Soil Frost Group
|
DI-1
(inches)
|
DI-2
(inches)
|
DI-3
(inches)
|
DI-4
(inches)
|
DI-5
(inches)
|
F2
|
7 to 10
|
8 to 12
|
9 to 14
|
10 to 16
|
11 to 18
|
F4*
|
15
|
18
|
22
|
25
|
28
|
*NOTE: Thicknesses after removal of top layer
of subgrade (natural undisturbed earth) and incorporation of a mixture
of coarse grade crushed stone (equal to or greater than two inches
size) at rate of 100 to 300 pounds per square yard.
|