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. |