Street Classification
| ||||
---|---|---|---|---|
Improvement
|
Rural/ Suburban
(minor)
|
Major/ Through
(collector)
|
Commercial Industrial
(business)
| |
Minimum width of right-of-way (feet)
|
50
|
60
|
60
| |
Minimum width of pavement or travel
surface (feet)
|
24
|
36
|
42
| |
Minimum radius of horizontal curves(feet)
|
150, except for street intersection
corners
|
300
|
400
| |
Minimum length of tangents between
reverse curves (feet)
|
100, except where excessive grades
may be reduced to reasonable grades by shortening tangent
|
200
|
200
| |
Maximum grade (percent)
|
10
|
10
|
10
| |
Minimum grade (percent)
|
2
|
2
|
2
|
Traffic Speed
(miles per hour)
|
Minimum Stopping Sight Distance
(feet)
| |
---|---|---|
30
|
200
| |
40
|
275
| |
50
|
350
| |
55
|
425
|