Type of Street
|
Minimum Radius of Arc at Intersection
of Cartway Edge or Curbline
(feet)
|
Minimum Radius of Arc at Intersection
of Right-of-Way
(feet)
|
---|---|---|
Minor arterial
|
40
|
30
|
Collector
|
35
|
25
|
Local
|
25
|
15
|
TABLE 10.1 DESIGN STANDARDS FOR STREETS
(All Dimensions in Feet Unless Specified)
| |||
---|---|---|---|
Type of Street
| |||
Design Specifications
|
Minor Arterial
|
Collector
|
Local and Marginal Access
|
Right-of-way width
|
805
|
605
|
50
|
Cartway width
| |||
With on-street parking and 4 lanes
|
605
|
605
|
NA
|
4 lanes without on-street parking
|
445
|
445
|
NA
|
With on-street parking and 2 lanes
|
405
|
365
|
306
|
2 lanes without on-street parking
|
345
|
305
|
266
|
Acceleration/Deceleration lane width (where
deemed necessary by the Board of Supervisors)
|
12
|
12
|
NA
|
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
(percent)
|
6
|
8
|
10
|
NOTES:
| |||
1 Horizontal sight
distances shall be measured from a point 3.5 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 by the Township Engineer.
| |||
4 Minimum grades
for all streets shall be 1.0%, unless a lesser grade is determined
to be acceptable by the Township Engineer.
| |||
5 Larger widths may
be required by PennDOT or the Township, as needed for turning lanes
and on-street parking.
| |||
6 Except up to 36
feet where the Board of Supervisors determines such width is needed
for on-street parking where townhouses are proposed along the street.
| |||
KEY:
NA = Not applicable.
|
Required Phase I Open Space
|
=
|
Phase I Units or Lots
Total Units or Lots
|
x [(Total Required Open Space) + (.1
x Total Required Open Space)]
|
Total Required open space = 2,000 square
feet total number of units in all phases
|
Distance Between Center Lines of Access
Drive or Driveway and Nearest Intersecting Street By Type of Intersecting
Street
| |||
---|---|---|---|
Type of Subdivision or Land Development
|
Minor Arterial
(feet)
|
Collector
(feet)
|
Local
(feet)
|
Single-family detached dwellings or garden apartments
|
150
|
100
|
75
|
Residential, other than single-family detached
dwellings or garden apartments
|
150
|
75
|
50
|
Nonresidential or mixed
|
300
|
200
|
100
|
Number of Required Trees
|
Minimum Number of Species
|
Maximum Percent of Any 1 Species
|
---|---|---|
1 to 9
|
1
|
100
|
10 to 24
|
2
|
50
|
25 to 44
|
3
|
40
|
45 to 99
|
4
|
30
|
100 or more
|
5
|
20
|
Small and Medium-Sized Trees
| ||
*
|
Acer bungeranum - trident maple
| |
*
|
Acer campestre - hedge maple
| |
*
|
Acer ginnala - Amur maple
| |
*
|
Acer tartaricum - Tartarian maple
| |
*
|
Amelanchier arborea - shadblows serviceberry
| |
*
|
Amelanchier X grandiflora (many cultivars) -
serviceberry
| |
*
|
Amelanchier laevis - Alleghany serviceberry
| |
*
|
Carpinus betulus - European hornbeam
| |
*
|
Carpinus caroliniana - American hornbeam
| |
Cercis canadensis - American redbud
| ||
Chinonanthus virginicus - white fringe-tree
| ||
Cornus florida - flowering dogwood
| ||
Cornus kousa - Kousa dogwood
| ||
*
|
Cornus mas - Conelian dogwood
| |
Cotinus coggygria - smoketree
| ||
*
|
Crataegus curg-galli, Inermis - thornless hawthorn
| |
Crataegus mongyna - single-seed hawthorn
| ||
Crataegus phaenopyrum - Washington hawthorn
| ||
Crataegus laevigata, Crimson King or Superba
- English hawthorn
| ||
Crataegus lavallei - Lavalle hawthorn
| ||
Crataegus toba - Toba hawthorn
| ||
Crataegus viridus cultivar Winterking - winterking
hawthorn
| ||
Halesia carolina - Carolina silverbell
| ||
*
|
Macckia amurensis - Amur maackia
| |
Magnolia soulangeana - saucer magnolia
| ||
Magnolia virginiana - sweetbay magnolia
| ||
Magnolia stellata - star magnolia
| ||
*
|
Malus floribunda - Japanese flowering crabapple
| |
*
|
Malus 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 and Centurion - crabapple
| |
*
|
Malus sieboldii X Zumi calocarpa - Zumi crabapple
| |
*
|
Ostrya virginiana - hophornbeam
| |
Oxydendrun arboreum - sourwood
| ||
*
|
Prunus accodlade - flowering cherry
| |
*
|
Prunus sargentii - Sargent cherry
| |
*
|
Prunus serrulata varieties - Japanese flowering
cherry
| |
Prunus virginiana varieties - chokecherry
| ||
*
|
Prunus yedoensis - Yoshino cherry
| |
*
|
Sorbus alnifolia - mountain-ash
| |
Sorbus aucuparia - European mountain-ash
| ||
*
|
Sorbus amurensis - Amur mountain-ash
| |
Styrax japonica - Japanese snowbell tree
| ||
*
|
Syringa reticulata - Japanese lilac tree
| |
Large-Sized Trees
| ||
Acer nigrum - black maple
| ||
Acer platanoides - Norway maple
| ||
Acer pseudo-platanus - sycamore maple
| ||
*
|
Acer rubrum - American red maple
| |
Acer saccharum - sugar maple
| ||
Aesculus carnea cultivar Briotti -
| ||
horsechestnut
| ||
Aesculus hippocastanum - common horsechestnut
| ||
Betula nigra - river birch
| ||
Betula platyphylla - white birch
| ||
*
|
Celtis jessoensis - Jesso hackberry
| |
*
|
Celtis laevigata - hackberry
| |
*
|
Celtis occidentalis - common hackberry
| |
Cercidiphyllum japonicum - Katsura tree
| ||
Cladrastis lutea - yellowwood
| ||
*
|
Corylus colurna - Turkish filbert
| |
*
|
Eucommia ulmoides - hardy rubber tree
| |
Fagus grandiflora - American beech
| ||
Fagus sylvatica - European beech
| ||
*
|
Fraxinus americana - white ash
| |
*
|
Fraxinus pennsylvania (seedless variety) - green
ash
| |
*
|
Ginko biloba - maiden hair tree (male only)
| |
Gymnocladus dioicus - Kentucky coffee-tree (male
only)
| ||
*
|
Koelreuteria paniculata - golden rain tree
| |
*
|
Liquidambar styraciflua - sweetgum
| |
*
|
Cornus mas - Conelian dogwood
| |
Cotinus coggygria - smoketree
| ||
*
|
Crataegus curg-galli, Inermis - thornless hawthorn
| |
Crataegus mongyna - single-seed hawthorn
| ||
Crataegus phaenopyrum - Washington hawthorn
| ||
Crataegus laevigata, Crimson King or Superba
- English hawthorn
| ||
Crataegus lavallei - Lavalle hawthorn
| ||
Crataegus toba - Toba hawthorn
| ||
Crataegus viridus cultivar Winterking - winterking
hawthorn
| ||
Halesia carolina - Carolina silverbell
| ||
*
|
Macckia amurensis - Amur maackia
| |
Magnolia soulangeana - saucer magnolia
| ||
Magnolia virginiana - sweetbay magnolia
| ||
Magnolia stellata - star magnolia
| ||
*
|
Malus floribunda - Japanese flowering crabapple
| |
*
|
Malus 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 and Centurion - crabapple
| |
*
|
Malus sieboldii X Zumi calocarpa - Zumi Crabapple
| |
*
|
Ostrya virginiana - hophornbeam
| |
Oxydendrun arboreum - sourwood
| ||
*
|
Prunus accodlade - flowering cherry
| |
*
|
Prunus sargentii - Sargent cherry
| |
*
|
Prunus serrulata varieties - Japanese flowering
cherry
| |
Prunus virginiana varieties - chokecherry
| ||
*
|
Prunus yedoensis - Yoshino cherry
| |
*
|
Sorbus alnifolia - mountain-ash
| |
Sorbus aucuparia - European mountain-ash
| ||
*
|
Sorbus amurensis - Amur mountain-ash
| |
Styrax japonica - Japanese snowbell tree
| ||
*
|
Syringa reticulata - Japanese lilac tree
| |
Large-Sized Trees
| ||
Acer nigrum - black maple
| ||
Acer platanoides - Norway maple
| ||
Acer pseudoplatanus - Sycamore maple
| ||
*
|
Acer rubrum - American red maple
| |
Acer saccharum - Sugar maple
| ||
Aesculus carnea cultivar Briotti -
| ||
horsechestnut
| ||
Aesculus hippocastanum - common horsechestnut
| ||
Betula nigra - river birch
| ||
Betula platyphylla - white birch
| ||
*
|
Celtis jessoensis - Jesso hackberry
| |
*
|
Celtis laevigata - hackberry
| |
*
|
Celtis occidentalis - common hackberry
| |
Cercidiphyllum japonicum - Katsura tree
| ||
Cladrastis lutea - yellowwood
| ||
*
|
Corylus colurna - Turkish filbert
| |
*
|
Eucommia ulmoides - hardy rubber tree
| |
Fagus grandiflora - American beech
| ||
Fagus sylvatica - European beech
| ||
*
|
Fraxinus americana - white ash
| |
*
|
Fraxinus pennsylvania (seedless variety) - green
ash
| |
*
|
Ginko biloba - maiden hair tree (male only)
| |
Gymnocladus dioicus - Kentucky coffeetree (male
only)
| ||
*
|
Koelreuteria paniculata - golden rain tree
| |
*
|
Liquidambar styraciflue - sweetgum
| |
*
|
Liriodendron tulipifera - tulip poplar
| |
*
|
Metasequoia glyptostroboides - dawn redwood
| |
*
|
Nyssa sylvatica - black gum
| |
*
|
Phellodendron amurense - Amur corktree
| |
Platanus X acerifolia cultivar Bloodgood - Bloodgood
London plane-tree
| ||
*
|
Prunus sargentii - Sargent cherry
| |
*
|
Pyrus calleryanna (not Bradford) - Callery pear
selections
| |
*
|
Quercus acutissima - sawtooth oak
| |
*
|
Quercus alba - white oak
| |
*
|
Quercus bicolor - swamp white oak
| |
*
|
Quercus cerris - Turkey oak
| |
*
|
Quercus coccinea - scarlet oak
| |
*
|
Quercus imbricaria - Shingle Oak
| |
*
|
Quercus macrocarpa - bur oak
| |
*
|
Quercus montana - chestnut oak
| |
*
|
Quercus palustris - pin oak
| |
*
|
Quercus phellos - willow oak
| |
*
|
Quercus robur - English oak
| |
*
|
Quercus rubra (borealis) - red oak
| |
*
|
Quercus shumardii - Shumard oak
| |
*
|
Quercus velutina - black oak
| |
*
|
Sophora japonica - Japanese pagoda tree
| |
*
|
Taxodium distichum - bald cypress
| |
Tilia americana - American linden
| ||
*
|
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 abies - 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 species - yew varieties
| |
Thuja occidentalis culitivars Nigra, Emerald
or Techy - dark-green arbor vitae
| |
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 species - Russian olive
| |
Ginkgo - female only
| |
Maclura pomifera - Osage-orange
| |
Morus species - mulberry
| |
Populus species - poplar
| |
Salix species - willow
| |
Ulmus americana - American elm
| |
Ulmus pumila - Siberian elm
|
*NOTE: Unless the Board of Supervisors approves
or requires another location (such as outside of the right-of-way)
or another location is needed to ensure adequate sight distance.
|