Table 180-35-1
| |||||
---|---|---|---|---|---|
Street Standards
| |||||
Arterial
|
Collector
|
Minor
| |||
Item
|
Residential
|
Cul-de-sac
|
Marginal Access
| ||
Row (feet)
|
80
|
60
|
50
|
50
|
40
|
Paving Width (feet)
|
*
|
36
|
26
|
26
|
24
|
Curbs and gutters
|
Yes1
|
Yes1
|
Yes2
|
Yes2
|
Yes2
|
Sidewalks
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Intersection radius (feet)
|
35
|
30
|
25
|
25
|
25
|
Maximum allowable grades (percent)
|
10
|
10
|
12
|
12
|
12
|
Minimum horizontal curve radius (feet)
|
3
|
500
|
300
|
150
|
150
|
Minimum length of tangents between horizontal curves (feet)
|
3
|
150
|
50
|
50
|
50
|
Minimum vertical curve length per 1% algebraic difference (feet)
|
3
|
25
|
20
|
20
|
20
|
Minimum intersection spacing (feet)
|
600
|
300
|
200
|
200
|
200
|
Minimum sight triangles (feet)
|
125
|
100
|
100
|
75
|
75
|
Minimum sight distance (feet)
|
600
|
450
|
300
|
300
|
300
|
Minimum design speed (mph)
|
60
|
40
|
30
|
30
|
30
|
Parallel parking permitted
|
No
|
No
|
Yes
|
Yes
|
Yes
|
NOTES:
| |
---|---|
*
|
As required by traffic operations, Pennsylvania Department of
Transportation or County standards.
|
1
|
Nonmountable.
|
2
|
Mountable.
|
3
|
As required by the American Association of State Highway Officials
standards for rural highways.
|
Table 180-35-2
| ||||
---|---|---|---|---|
Driveway Widths and Maximum Grades
| ||||
Land Use
|
Minimum Paving Width
(feet)
|
Minimum Radius at Curb
(feet)
|
Maximum Grade
(percent)
| |
Single-family
|
9
|
5
|
15
| |
Residential:
| ||||
Townhouse courts
|
15 (1-way)
|
20
|
12
| |
Multifamily
|
20 (2-way)
|
20
|
12
| |
Commercial
|
20 (1-way)
|
25 or more
|
7
|
Table 180-38
| |||
---|---|---|---|
Plant Material Sizes for Buffers and Street Trees
| |||
Type
|
Caliper
|
Height
| |
Shade trees: (balled and burlapped)
|
2 inches
|
10 feet
| |
Evergreen trees: (balled and burlapped)
|
N/A
|
5 feet
| |
Shrubs:
(balled and burlapped or container grown)
| |||
Deciduous
|
36 inches
| ||
Evergreen
|
30 inches
|