Design Element
|
Major Street
|
Secondary Street
|
Local Street
| ||
---|---|---|---|---|---|
a.
|
Minimum right-of-way width
|
60 feet
|
60 feet
|
50 feet
| |
b.
|
Minimum traveled-way width
|
40 feet
|
30 feet
|
26 feet
| |
c.
|
Maximum grade
|
6%
|
8%
|
10%
| |
d.
|
Minimum grade
|
1%
|
1%
|
1%
| |
e.
|
Minimum radius of horizontal curve at center line
|
400 feet
|
250 feet
|
125 feet
| |
f.
|
Minimum length of vertical curve
|
300 feet*
|
200 feet*
|
100 feet**
| |
g.
|
Minimum length of tangent between reverse curves
|
300 feet
|
200 feet
|
100 feet
| |
h.
|
Minimum sight distance
|
400 feet
|
300 feet
|
200 feet
| |
i.
|
Road pavement, shoulders, sidewalks, drainage structures, curbs,
etc.
|
See Town Construction Standards and Specifications.
|
*
|
But not less than 40 feet for each 1% algebraic difference in
grade.
| |
**
|
But not less than 20 feet for each 1% algebraic difference in
grade.
|