Improvement
|
Residential With C/G*
|
Residential Without C/G*
|
Commercial/ Industrial With C/G*
|
Commercial/ Industrial Without C/G*
| ||||
---|---|---|---|---|---|---|---|---|
Minimum right-of-way (feet)
|
66
|
66
|
66
|
66
| ||||
Minimum width of base course (including curb,
gutter or shoulders) (feet)
| ||||||||
Local
|
30
|
28
|
32
|
32
| ||||
Collector
|
32
|
32
|
40
|
50
| ||||
Arterial
|
40
|
34
|
40
|
50
| ||||
Minimum width of surfacing (feet)
| ||||||||
Local
|
30
|
20
|
32
|
24
| ||||
Collector
|
32
|
22
|
40
|
30
| ||||
Arterial
|
40
|
24
|
48
|
48
| ||||
Maximum grade (percent)
| ||||||||
Local**
|
10
|
10
|
8
|
8
| ||||
Collector**
|
8
|
8
|
6
|
6
| ||||
Arterial**
|
6
|
6
|
6
|
6
| ||||
Minimum radius of horizontal curve (feet)
| ||||||||
Local
|
100
|
100
|
200
|
200
| ||||
Collector
|
100
|
100
|
200
|
200
| ||||
Arterial
|
300
|
300
|
400
|
400
| ||||
Corner radius at intersections (feet)
|
15
|
30
|
15
|
30
| ||||
Minimum length of vertical curve (feet)
| ||||||||
Local
|
100, but not less than 20 feet for each algebraic
difference in grade
| |||||||
Collector
|
200, but not less than 50 feet for each 1%
| |||||||
Arterial
|
300, but not less than 50 feet for each algebraic
difference in grade
| |||||||
Minimum length of tangents between reverse curves
(feet)
| ||||||||
Local
|
100
|
100
|
200
|
200
| ||||
Collector
|
100
|
100
|
200
|
200
| ||||
Arterial
|
200
|
200
|
300
|
300
| ||||
Minimum sight distance (feet)
| ||||||||
Local
|
200
|
200
|
200
|
200
| ||||
Collector
|
250
|
250
|
250
|
250
| ||||
Arterial
|
300
|
300
|
300
|
300
| ||||
Design speed (miles per hour)
| ||||||||
Local
|
30
|
30
|
30
|
30
| ||||
Collector
|
35
|
35
|
35
|
35
| ||||
Arterial
|
40
|
40
|
40
|
40
| ||||
Culs-de-sac (permanent)
| ||||||||
Maximum length: maximum desirable length of
roads with culs-de-sac is 1,000 feet. Through roads are most desirable.
| ||||||||
Minimum right-of-way radius at culs-de-sac (feet)
| ||||||||
Local
|
60
|
60
|
60
|
60
| ||||
Minimum base course radius (feet)
| ||||||||
Local
|
40
|
42
|
40
|
42
| ||||
Minimum pavement radius (feet)
| ||||||||
Local
|
40
|
40
|
40
|
40
|
Notes:
| ||
---|---|---|
*
|
"With C/G" means with curb/gutter. "Without
C/G" means without curb/gutter.
| |
**
|
Minimum grade 0.5.
|