Street Type/Design Standards
|
Minimum ROW
(feet)
|
Minimum Cartway Width
(feet)
|
Maximum Grade
(percent)
|
Minimum Grade
(percent)
|
Minimum Radii of Center Line
(feet)
|
Minimum Sight Distance
(feet)
|
---|---|---|---|---|---|---|
Arterial streets
|
80
|
36
|
5.0%
|
0.5%
|
500
|
400
|
Collector streets
|
60
|
30
|
7.5%
|
0.5%
|
400
|
300
|
Local streets
|
50
|
30
|
10.0%
|
0.5%
|
200
|
200
|
Culs-de-sac
|
50
|
30
|
10.0%
|
0.5%
|
100
|
100
|
Marginal access streets
|
40
|
24
|
10.0%
|
0.5%
|
100
|
100
|
Alleys
|
20
|
20
|
10.0%
|
0.5%
|
50
|
50
|
Pedestrian crosswalks
|
12
|
8
|
—
|
—
|
—
|
—
|