Type of Street
|
Minimum Radius of Arc at Intersection
of Cartway Edge or Curbline
(in feet)
|
Minimum Radius of Arc at Intersection
of Right-of-Way
(in feet)
| |
---|---|---|---|
Arterial
|
40
|
30
| |
Collector
|
35
|
25
| |
Local
|
25
|
15
|
TABLE 1
DESIGN STANDARDS FOR STREETS
(All Dimensions in Feet Unless Specified)
| ||||
---|---|---|---|---|
Design Specifications
|
Type of Street Arterial
|
Collector
|
Local
| |
Right-of-way width5
|
60 to 80
|
50 to 60
|
50
| |
Cartway width
|
As determined by PennDOT to be necessary
|
30 to 365
|
26 to 325
| |
Minimum sight distance1
|
475
|
300
|
200
| |
Minimum tangent between reverse curves2
|
200
|
100
|
100
| |
Minimum center-line radii for horizontal curves
|
4003
|
300
|
150
| |
Maximum grade4
|
6%
|
8%
|
10%
|
NOTES:
| ||
1
|
Horizontal sight distances shall be measured
from a point 3.50 feet above the road surface to a point six inches
above the road surface, and shall be based upon standards of the American
Association of State Highway and Transportation Officials (AASHTO).
| |
2
|
All tangents shall be measured along the street
center line.
| |
3
|
Larger radii may be required as determined to
be needed by the City Engineer or PennDOT.
| |
4
|
Minimum grades for all streets and alleys shall
be 0.5%.
| |
5
|
The Planning Commission shall determine the
appropriate width within the ranges provided in this table based upon:
the width of connecting streets, the need for on-street parking, the
amount of traffic expected over the long-run once any street extensions
are completed and recommendations of the city staff. Generally, local
streets in most cases are intended to have a minimum cartway width
of 30 feet, except:
|
Deciduous Trees
| |
Acer bungeranum - Trident maple
| |
Acer campestre - Hedge maple
| |
Acer ginnala - Amur maple
| |
Acer rubrum - American red maple
| |
Acer tartaricum - Tartarian maple
| |
Amelanchier arborea - Shadblos serviceberry
| |
Amelanchier X grandiflora (many cultivars) -
Serviceberry
| |
Amelanchier lavis - Alleghany serviceberry
| |
Carpinus betulus - European hornbeam
| |
Carpinus caroliniana - American hornbeam
| |
Cornus mas - Conelian dogwood
| |
Celtis jessoensis - Jesso hackberry
| |
Celtis laevigata - Hackberry
| |
Celtis occidentalis - Common hackberry
| |
Corylus colurna - Turkish filbert
| |
Crataegus curg-galli Inermis - Thornless hawthorn
| |
Eucommia ulmoides - Hardy rubber tree
| |
Fraxinus americana - White ash
| |
Fraxinus pennsylvania (seedless variety) - Green
ash
| |
Ginko biloba - Maiden hair tree (male only)
| |
Koelreuteria paniculata - Golden rain tree
| |
Liquidambar styraciflue - Sweet gum
| |
Liriodendron tulipifera- Tulip poplar
| |
Metasequoia glyptostroboides - Dawn redwood
| |
Nyssa sylvatica - Black gum
| |
Macckia amurensis - Amur macckia
| |
Malus floribunda - Japanese flowering crabapple
| |
Maus cultivars that are disease resistant -
Adams, Baskatong, Bob White, Evelyn, Liset, Madonna, Ormiston Roy,
Professor Spengei, Red Jewel, Sentinel, Sugar Tyme, Strawberry Parfait,
Donald Wyman, Centurion - Crabapple
| |
Malus sieboldii X Zumi Calocarpa - Zumi crabapple
| |
Ostrya virginiana - Hophornbeam
| |
Phellodendron amurense - Amur corktree
| |
Prunus sargentii - Sargent cherry
| |
Pyrus calleryanna (not Bradford) - Callery pear
selections
| |
Quercus - All varieties of oak
| |
Prunus Accodlade - Flowering cherry
| |
Prunus serrulata varieties - Japanese flowering
cherry
| |
Prunus yedoensis - Yoshino cherry
| |
Sophora japonica - Japanese pagoda tree
| |
Sorbus alnifolia - Mountain ash
| |
Sorbus amurensis - Amur mountain ash
| |
Syringa reticulata - Japanese lilac tree
| |
Taxodium distichum - Bald cypress
| |
Tilia cordata - Little leaf linden
| |
Tilia X euchlora (ungrafted only) - Crimean
linden
| |
Tilia petiolaris - Pendant silver linden
| |
Tilia tomentosa - Silver linden
| |
Ulmus parvifolia - Chinese lacebark elm
| |
Zelkova serrata - Japanese zelkova
|
Cedrus altlantica - Atlas cedar
| |
Chamaecyparis obtusa - Hinoki cedar
| |
Chamaecyparis pisifera - Hinoki false cypress
| |
Chamaecyparis thyoides - Atlantic white cedar
| |
Cupressocyparis leylandii - Leyland cypress
| |
Ilex opaca - American holly
| |
Picea ables - Norway spruce
| |
Picea omorika - Serbian spruce
| |
Picea orientalis - Oriental spruce
| |
Picea pungens - Colorado spruce
| |
Pinus bungeana - Lace bark pine
| |
Pinus densiflora - Japanese red pine
| |
Pinus nigra - Austrian pine
| |
Pinus strobus - Eastern white pine
| |
Pseudotsuga menziesii - Douglas fir
| |
Pseudotsuga taxifolia - Douglas fir
| |
Sciadopitys verticillat - Japanese umbrella
pine
| |
Taxus sp. - Yew varieties
| |
Thuja occidentalis cv. Nigra, Emerald or Techy
- Dark Green
| |
Arborvitae
| |
Tsuga canadensis - Canada hemlock
| |
Tsuga caroliniana - Carolina hemlock
|
Acer negundo - Box elder
| |
Acer saccharinum - Silver maple
| |
Ailanthus altissima - Tree of heaven
| |
Catalpa speciosa - Catalpa
| |
Elaeagnus spp. - Russian olive
| |
Ginkgo - female only
| |
Maclura pmifera - Osage orange
| |
Morus spp. - Mulberry
| |
Populus spp. - Poplar
| |
Salix spp. - Willow
| |
Ulmus americana - American elm
| |
Ulmus pumila - Siberian elm
|