Table 8-1
Minimum Right-of-Way and Cartway Widths by Street Classification
| ||||||
---|---|---|---|---|---|---|
Street Classifi- cation
|
Right-of-Way Minimum
(feet)
|
Cartway Minimum
(feet)
|
Recommended Minimums
(feet)
| |||
Travel Lane
|
Parking Lane
|
Paved Shoulder^
| ||||
Arterial
|
80
|
**
|
11-12
|
10-12
|
8-10
| |
Collector
|
60
|
48
|
10-12
|
7-11
|
6-10
| |
Local
|
50
|
36
|
9-11
|
7-8
|
—
| |
Access Road
|
*
|
24
|
9-10
|
7-8
|
—
|
NOTES:
| ||
*
|
Adequate width to provide utilities, drainage facilities, landscaping,
grading, travel and parking lanes, curb, and pedestrian spaces.
| |
^
|
The paved shoulder for arterial and collector roads should have 5 to 6 feet of width reserved for a bicycle lane. Also, see § 195-807.
| |
**
|
As recommended by PennDOT.
|
Table 8-2
Clear Sight Distances by Grade By Posted Speed Limit
| |||||||
---|---|---|---|---|---|---|---|
Posted Speed
(miles per hour)
|
Required Sight Distance in Feet by the Grade of the Street
| ||||||
-9%
|
-6%
|
-3%
|
3%
|
6%
|
9%
| ||
15 to 25
|
173
|
165
|
158
|
147
|
143
|
140
| |
30
|
227
|
215
|
205
|
200
|
184
|
179
| |
35
|
287
|
271
|
257
|
237
|
229
|
222
| |
40
|
354
|
333
|
315
|
289
|
278
|
269
| |
45
|
427
|
400
|
378
|
344
|
331
|
320
| |
50
|
507
|
474
|
446
|
405
|
388
|
375
| |
55
|
593
|
553
|
520
|
469
|
450
|
433
|
Table 8-3
Aisle Widths by Parking Position
| |||
---|---|---|---|
Parking Position
|
Minimum One-Way Aisle Width
|
Minimum Two-Way Aisle Width
| |
Parallel
|
12
|
18
| |
30°
|
12
|
18
| |
45°
|
13
|
18
| |
60°
|
15
|
20
| |
90°
|
20
|
24
|
Table 8-4
Non-Motorized Circulation Improvements by Street Classification
| |||
---|---|---|---|
Street Classification
|
Sidewalk or Pathway
|
Bicycle Lane/Paved Shoulder
| |
Arterial
|
Required Both Sides
|
Required Both Sides
| |
Collector
|
Required Both Sides
|
Required Both Sides
| |
Local
|
Required Both Sides
|
Optional
| |
Access Road
|
Required One Side
|
Optional
|
Table 8-5
Tree Replacement Schedule
| ||
---|---|---|
For Each Tree to be Removed, at the Following Calipers
|
Minimum Number & Caliper of Replacement Trees
| |
One, 12" to 18" caliper
|
One 3 1/2" caliper
| |
One, greater than 18" to 24" caliper
|
Two 3 1/2" caliper
| |
One, greater than 24" to 36" caliper
|
Three 3 1/2" caliper
| |
One, greater than 36" caliper
|
Four 3 1/2" caliper
|
Table 8-6
Approved List of Street Trees
| |||
---|---|---|---|
Botanical Name
|
Common Name
|
Acceptable Varieties
| |
LARGE TREES >45 feet (Not for under overhead wires or tree lawns
under 6 feet wide)
| |||
Acer rubrum
|
Red Maple
|
Red Sunset/October Glory
| |
Fraxinus pennsylvanica
|
Green Ash
| ||
Celtis occidentalis
|
Hackberry
| ||
Ginkgo biloba
|
Ginkgo (males only)
|
Fastagiata/Princeton Sentry
| |
Gleditsia triacanthos
|
Thornless Honeylocust
|
Inerms
| |
Metasequoia glyptostroboides
|
Dawn Redwood*
| ||
Nyssa sylvatica
|
Black Gum
| ||
Platanus x acerifolia
|
London-Plane tree*
| ||
Pyrus calleryana bradford
|
Bradford Callery Pear
|
Red Spire Callery Pear
| |
Quercus bicolor
|
Swamp White Oak
| ||
Quercus coccinea
|
Scarlet Oak
| ||
Quercus macrocarpa
|
Bur Oak
| ||
Quercus palustris
|
Pin Oak
| ||
Quercus phellos
|
Willow Oak
| ||
Quercus prinus
|
Chestnut Oak
| ||
Quercus rubra
|
Red Oak
| ||
Quercus velutina
|
Black Oak
| ||
Sophora japonica
|
Scholar Tree*
| ||
Tilia tomentosa
|
Silver Linden
| ||
SMALL TREES: UP TO 30 feet (Appropriate near overhead wires)
| |||
Acer buergerianum
|
Trident Maple*
| ||
Acer ginnala
|
Amur Maple*
|
Beethoven Mozart, and others
| |
Cercis Canadensis
|
Eastern Redbud
| ||
Cornus kousa
|
Kousa Dogwood*
| ||
Cornus mas
|
Cornelian Cherry Dogwood*
| ||
Carpinus caroliniana
|
American Hornbeam
| ||
Crataegus crusgalli
|
Thornless Cockspur Hawthorn
|
Inermis
| |
Crataegus viridis
|
Green Hawthorn*
|
Winter King
| |
Magnolia virginiana
|
Sweetbay Magholia*
| ||
Malus spp
|
Crabapple species
| ||
Prunus serrulata
|
Oriental Cherry*
|
*
|
Nonnative, but a popular ornamental noninvasive species
| |
Sources: Morris Arboretum's Recommended Trees for Philadelphia
Metropolitan Habitats (2000)
| ||
Compatible Tree Factsheets, 2nd Ed., Gerhold, Henry D., et.al.,
Ed. Penn State College of Agricultural Sciences (2001)
|
Table 8-7
Open Space and Recreational Acreage Requirements
| ||
---|---|---|
Dwelling Unit Density Per Net Residential Acre*
|
Minimum Required Percent of the Net Residential Acreage
Which Must Be Dedicated
| |
5 units per acre
|
3.0%
| |
6 units per acre
|
3.4%
| |
7 units per acre
|
3.9%
| |
8 units per acre
|
4.6%
| |
10 to 19 units per acre
|
5.8%
| |
20 to 29 units per acre
|
9.3%
| |
30 or more units per acre
|
12.6%
|
*
|
Net residential acreage equals the total acreage minus areas
for transportation easements, including parking areas.
|