Standards of Adequacy for Existing
Ways
| |||||
---|---|---|---|---|---|
Total No. of Dwelling Units
|
1-4**
|
5-10
|
11-49
|
50+
|
Business District
|
Minimum ROW width (feet)
|
33
|
33
|
40
|
50
|
60
|
Surface type****
|
3 inches bit. con.
|
3 inches bit. con.
|
4 inches bit. con.
|
4 inches bit. con.
|
4 inches bit. con.
|
Surface width* (feet)
|
***
|
18
|
22
|
24
|
24
|
Minimum sight distance (feet)
|
250
|
250
|
250
|
350
|
250
|
Maximum grade
|
10%
|
10%
|
8%
|
6%
|
6%
|
*
|
Over the entire width of the way, including
curbing and berms, if any.
| |||||
**
|
No further access; see definition of
a "street, minor B."
| |||||
***
|
For residential lots: 14 feet wide
for two lots; 16 feet wide for three lots; and 18 feet wide for four
lots.
| |||||
****
|
With adequate road base in the opinion
of the Board's engineer.
|
Posted Speed on Existing Road
(mph)
|
Required Site Distance
(feet)
| |
---|---|---|
30
|
350
| |
35
|
415
| |
40
|
475
| |
45
|
540
| |
50
|
600
|
Area Description
|
Design Speed
(mph)
|
Required Site Distance
(feet)
| |
---|---|---|---|
Thickly settled and/or buildings less than 200
feet apart
|
30
|
350
| |
Outside a thickly settled or business district
|
40
|
475
| |
On a highway outside a thickly settled or business
district
|
50
|
600
|