Street Type/Design Standards
|
Minimum ROW
(feet)
(Note 1)
|
Minimum Cartway Width
(feet)
|
Maximum Grade
|
Minimum Grade
|
Minimum Radii of Center Line
(feet)
|
Minimum Sight Dist.
(feet)
(Note 2)
|
Maximum Length
(feet)
(Note 3)
|
---|---|---|---|---|---|---|---|
Major thoroughfares
|
80
|
36
|
5.0%
|
0.5%
|
500
|
400
|
—
|
Collector streets
|
60
|
30
|
7.5%
|
0.5%
|
400
|
300
|
—
|
Local streets
|
50
|
24
|
10.0%
|
0.5%
|
200
|
200
|
—
|
Marginal access streets
|
40
|
20
|
10.0%
|
0.5%
|
100
|
100
|
—
|
Culs-de-sac
|
40
|
20
|
10.0%
|
0.5%
|
100
|
100
|
600
|
Alleys
|
20
|
20
|
10.0%
|
0.5%
|
50
|
50
|
—
|
Pedestrian
|
12
|
8
|
—
|
—
|
—
|
—
|
—
|
NOTES:
| ||
---|---|---|
(1)
|
Additional widths may be required upon findings that
the same are required for:
| |
(a)
|
Public safety and convenience.
| |
(b)
|
Parking in commercial or public use areas.
| |
(c)
|
Old roads which do not provide the proper widths, and
where, as a consequence, additional dedication is necessary.
| |
(2)
|
Sight distance shall be measured along the center line
at eye level. Proper sight lines should be maintained at all intersections
or streets. Measured along the center line, there should be a clear
sight triangle or 75 feet from the point of intersection. No future
building or obstruction shall be permitted in this area.
| |
(3)
|
Culs-de-sac shall be designated with a turnaround having
an outside cartway diameter of at least 80 feet and a property line
diameter of at least 100 feet.
|