Table 192.1
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Design Standards For Streets
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Minimum Street Design Requirements
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Minor Township Road
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Local Road
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Collector
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Minor Arterial
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Principal Arterial
|
Right-of-way width (feet)
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50
|
50
|
50
|
60
|
80
|
Pavement width (feet)
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22 to 301
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22 to 301
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30 (11-foot lanes, 4-foot shoulders, no parking)
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36 (12-foot lanes, 6-foot shoulders, no parking)
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3
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Design AADT (vehicles)
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Less than 400
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400 to 1,500
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1,500 to 3,500
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Greater than 3,500
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4
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Planned posted speed limit (mph)
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25
|
25
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25 to 35
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35 to 45
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Greater than or equal to 45
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Design speed
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2
|
2
|
2
|
2
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2
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Minimum center line radius (feet)
|
260
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260
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260 to 510
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3
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3
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Superelevation
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0%
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0%
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0% to 2%
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2% to 4%
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3
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Maximum vertical grade
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10%
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10%
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8%
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6%
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6%
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Minimum stopping sight distance (feet)
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200
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200
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200 to 305
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3
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3
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Minimum center line vertical grade
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1%
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1%
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1%
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1%
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1%
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NOTES:
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---|---|
1
|
Varies depending on typical section selected.
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2
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Five miles per hour greater than planned posted speed limit.
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3
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Specific project design, in accordance with PennDOT design criteria.
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4
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Specific project design, in accordance with transportation impact
study recommendations.
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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)
|
---|---|---|
Arterial
|
40
|
30
|
Collector
|
35
|
25
|
Local
|
25
|
15
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Common Name
|
Scientific Name
|
Variety
|
---|---|---|
Canadian serviceberry
|
Amelanchier canadensis
|
Autumn Sunset (single-trunk tree form)
|
Canadian serviceberry
|
Amelanchier canadensis
|
Cumulus (single-trunk tree form)
|
Canadian serviceberry
|
Amelanchier canadensis
|
White Pillar (single-trunk tree form)
|
Allegheny serviceberry
|
Amelanchier laevis
|
Cumulus (single-trunk tree form)
|
Serviceberry
|
Amelanchier x grandiflora
|
Autumn Brilliance (single-trunk tree form)
|
Serviceberry
|
Amelanchier x grandiflora
|
Trazam (single-trunk tree form)
|
Serviceberry
|
Amelanchier x grandiflora
|
Cole's Select (single-trunk tree form)
|
Galaxy magnolia
|
Magnolia sp.
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Galaxy Tree Form
|
Crabapple
|
Malus sp.
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Adirondack
|
Crabapple
|
Malus sp.
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Ballerina
|
Crabapple
|
Malus sp.
|
Donald wyman
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Crabapple
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Malus sp.
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Pink dawn
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Sargent cherry
|
Prunus sargentii
|
Columnaris
|
Japanese flowering cherry
|
Prunus serrulata
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Amanogawa (single-trunk tree form)
|
Japanese flowering cherry
|
Prunus serrulata
|
Accolade
|
Japanese flowering cherry
|
Prunus serrulata
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Autumnalis
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Japanese flowering cherry
|
Prunus serrulata
|
Kwanzan
|
Japanese flowering cherry
|
Prunus serrulata
|
Okame
|
Common chokecherry
|
Prunus virginiana
|
Schubert
|
Snow goose cherry
|
Prunus sp.
|
Snow goose
|
Common Name
|
Scientific Name
|
Variety
|
---|---|---|
Hedge maple
|
Acer campestre
|
Evelyn
|
Hedge maple
|
Acer campestre
|
Miyabe
|
Red horsechestnut
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Aesculus x carnea
|
Briotti
|
Red horsechestnut
|
Aesculus x carnea
|
Fort McNair
|
Heritage river birch
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Betula nigra
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Heritage (single-trunk tree form)
|
Upright European hornbeam
|
Carpinus betulus
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Fastigiata
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American hornbeam, musclewood
|
Carpinus caroliniana
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Carolina silverbell
|
Halesia carolina
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Sweetbay magnolia
|
Magnolia virginiana
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Sourwood
|
Oxydendrum arboreum
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Hophornbeam
|
Ostrya virginiana
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Japanese tree lilac
|
Syringa reticulata
|
Ivory Silk
|
Common Name
|
Scientific Name
|
Variety
|
---|---|---|
Black maple
|
Acer nigrum
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Sugar maple
|
Acer saccharum
|
Gold mountain
|
Sugar maple
|
Acer saccharum
|
Goldspire
|
American chestnut
|
Castanea dentata
|
Only blight-resistant hybrids
|
Common hackberry
|
Celtis occidentalis
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Katsura-tree
|
Cercidiphyllum japonicum
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Thornless honeylocust
|
Gleditsia triacanthos var. inermis
|
Only thornless cultivars like shademaster or majestic
|
Kentucky coffeetree
|
Gymnocladus dioicus
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Tuliptree, yellow poplar
|
Liriodendron tulipifera
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Sweetgum
|
Liquidambar styraciflua
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Cucumber magnolia
|
Magnolia acuminata
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Black tupelo, black gum
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Nyssa sylvatica
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London plane-tree
|
Platanus x acerifolia
|
Bloodgood
|
American sycamore
|
Platanus occidentalls
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White oak
|
Quercus alba
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Swamp white oak
|
Quercus bicolor
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Scarlet oak
|
Quercus coccinea
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Shingle oak
|
Quercus imbricaria
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Bur oak
|
Quercus macrocarpa
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Willow oak
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Quercus phellos
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English oak
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Quercus robur
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Attention
|
English oak
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Quercus robur
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Skymaster
|
English oak
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Quercus robur
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Skyrocket
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Red oak
|
Quercus rubra
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Shumard oak
|
Quercus shumardii
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American linden, basswood
|
Tilia americana
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Littleleaf linden
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Tilia cordata
|
Corinthian
|
Littleleaf linden
|
Tilia cordata
|
Chancellor
|
American elm
|
Ulmus americana
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Only cultivars resistant to Dutch Elm Disease
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Japanese zelkova
|
Zelkova serrata
|
Green vase
|
Japanese zelkova
|
Zelkova serrata
|
Village green
|
Percentage of the Total Required Public Recreation Land
that Would Meet the Definition of "Prime Recreation Land"
|
Minimum Required Public Recreation Land Per Permitted
Dwelling Unit
(square feet)
|
---|---|
0% to 25.0%
|
6,000
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25.1% to 75.0%
|
3,000
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75.1% to 100%
|
1,500
|
Neighborhood and Minimal-Use or Short-Length Trail
|
Collector Trails Serving or Connecting More Than One Neighborhood
or Destination
|
Multiuse Trail Planned for Significant Use By Multiple
Modes
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---|---|---|---|
Minimum pavement width (feet)
|
5
|
8
|
12
|
Minimum easement or right-of-way width1 (feet)
|
10
|
15
|
20
|
Maximum grade2
|
7.00%
|
5.00%
|
5.00%
|
Maximum cross slope
|
2.00%
|
2.00%
|
2.00%
|
Minimum vertical clearance (feet)
|
10
|
10
|
10
|
Minimum horizontal clearance, from each side of pavement (feet)
|
2
|
3
|
4
|
NOTES:
| |
---|---|
1
|
Minimum two-foot-wide graded shoulder on each side.
|
2
|
Short sections of steeper grades may be permitted to allow design
compatible with surrounding topography.
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