Design Standards
Recommended Small Trees | ||
|---|---|---|
Botanical Name | Common Name | Minimum Planting Size |
Acer buergeranum | Trident Maple | 2 1/2 to 3-inch caliper |
Acer campestre | Hedge Maple | 2 1/2 to 3-inch caliper |
Acer ginnala | Amur Maple | 2 1/2 to 3-inch caliper |
Amelacnier x hydrida 'Cumulus' | Shadblow Serviceberry 'Cumulus' | 2 1/2 to 3-inch caliper |
Crataegus phaenopyrum x fastigiata | Washington Hawthorn | 2 1/2 to 3-inch caliper |
Crataegus viridis | Green Hawthorne | 2 1/2 to 3-inch caliper |
Magnolia x lobneri 'Merrill' | Merrill Magnolia | 10 to 12 feet |
Syringa reticulata | Japanese Tree Lilac | 10 to 12 feet |
Recommended Medium Trees | ||
|---|---|---|
Botanical Name | Common Name | Minimum Planting Size |
Acer rubrum 'Northwood' | Northwood Red Maple | 2 1/2 to 3-inch caliper |
Acer rubrum 'Scanlon' | Scanlon Red Maple | 2 1/2 to 3-inch caliper |
Acer saccharum 'Goldspire' | Goldspire Sugar Maple | 2 1/2 to 3-inch caliper |
Celtis bungeana | Bunge Hackberry | 2 1/2 to 3-inch caliper |
Cladratis lutea | Yellowwood | 2 1/2 to 3-inch caliper |
Caprinus carolinana | American Hornbeam | 2 1/2 to 3-inch caliper |
Phellondendron amurense | Amur Corktree | 2 1/2 to 3-inch caliper |
Tilia cordata x 'Whitehouse' | Whitehouse Linden | 2 1/2 to 3-inch caliper |
Recommended Large Street Trees | ||
|---|---|---|
Botanical Name | Common Name | Minimum Planting Size |
Acer rubrum 'October Glory' | October Glory Red Maple | 2 1/2 to 3-inch caliper |
Acer rubrum 'Red Sunset' | Red Sunset Red Maple | 2 1/2 to 3-inch caliper |
Celtis occidentalis 'Magnifica' | Magnifica Hackberry | 2 1/2 to 3-inch caliper |
Fraxinus americana 'Autumn Purple' | Autumn Purple Ash | 2 1/2 to 3-inch caliper |
Ginko biloba (male only) | Ginko | 2 1/2 to 3-inch caliper |
Plantanus acerifolia | London Planetree | 2 1/2 to 3-inch caliper |
Platanus occidentalis | Sycamore | 2 1/2 to 3-inch caliper |
Quercus coccinea | Scarlet Oak | 2 1/2 to 3-inch caliper |
Quercus marcocarpa | Bur Oak | 2 1/2 to 3-inch caliper |
Quercus phellos | Willow Oak | 2 1/2 to 3-inch caliper |
Quercus rubra | Red Oak | 2 1/2 to 3-inch caliper |
Sophora japonica 'Regent' | Regent Scholartree | 2 1/2 to 3-inch caliper |
Tilia x euchlora | Crimean Linden | 2 1/2 to 3-inch caliper |
Tilia tomentosa 'Green Mountain' | Green Mountain Silver Linden | 2 1/2 to 3-inch caliper |
Ulmus parvifolia | Chinese Elm | 2 1/2 to 3-inch caliper |
Zelkova serrata 'Village Green' | Japanese Zelkova | 2 1/2 to 3-inch caliper |
Additional Recommended Tree | ||
|---|---|---|
Botanical Name | Common Name | Minimum Planting Size |
Acer palmatun | Japanese Maple | 6 to 7 feet |
Acer Saccharum | Sugar Maple | 2 1/2 to 3-inch caliper |
Betula pendula | Weeping Birch | 12 to 14 feet |
Cedrus atlantica glauca | Blue Atlas Cedar | 6 to 8 feet |
Cercis Canadensis | Eastern Redbud | 6 to 8 feet |
Cornus kousa | Chinese Dogwood | 1-1/2 to 2-inch caliper |
Crataegus crusgalli inermis | Thornless Cockspur Hawthorn | 2 1/2 to 3-inch caliper |
Fagus grandiflora | American Beech | 2 1/2 to 3-inch caliper |
Fagus atropinicea | Copper Beech | 2 1/2 to 3-inch caliper |
Gleditsia triacanthos inermis | Thornless Honeylocust | 2 1/2 to 3-inch caliper |
Ilex Opaca | American Holly | 6 to 8 feet |
Juniperus virginiana | Eastern Red Cedar | 6 to 8 feet |
Liriodendron tulipifera | Tulip Poplar | 2 1/2 to 3-inch caliper |
Oxydendrum arboretum | Sourwood | 2 1/2 to 3-inch caliper |
Picea abies | Norway Spruce | 6 to 8 feet |
Picea omorika | Serbian Spruce | 6 to 8 feet |
Pinus thunbergiana | Japanese Black Pine | 6 to 8 feet |
Pinus virginiana | Virginia Pine | 6 to 8 feet |
Prunus cerasifera | Flowering Plum | 1-1/2 to 2-inch caliper |
Prunus serrulata | White Cherry | 1-1/2 to 2-inch caliper |
Pseudolarix kaempferi | Golden Larch | 6 to 8 feet |
Pseudotsuga menziesii | Douglas Fir | 6 to 8 feet |
Quercus acutissima | Sawtooth Oak | 2 1/2 to 3-inch caliper |
Quercus palustris | Pin Oak | 2 1/2 to 3-inch caliper |
Tilia cordata 'Greenspire' | Greenspire Linden | 2 1/2 to 3-inch caliper |
Tilia tomentosa 'Green Mountain' | Green Mountain Silver Linden | 2 1/2 to 3-inch caliper |
Recommended Shrubs | ||
|---|---|---|
Botanical Name | Common Name | Minimum Planting Size |
Abelia x grandiflora | Glossy Abelia | 18 to 24 inches |
Aronia arbtutifolia | Red Chokeberry | 2 to 3 feet |
Azalea arborescens | Sweet Azalea | 18 to 24 inches |
Azalea atlanticum 'Marydel' | Marydel Azalea | 18 to 24 inches |
Azalea cumberlandense | Cumberland Azalea | 18 to 24 inches |
Azalea 'Delaware Valley' | Delaware Valley Azalea | 18 to 24 inches |
Azalea 'Hino Crimson' | Hino Crimson Azalea | 18 to 24 inches |
Azalea 'Pennsylvania' | Pennsylvania Azalea | 18 to 24 inches |
Azalea vaseyi | Pinkshell Azalea | 18 to 24 inches |
Azalea viscosum | Swamp Azalea | 18 to 24 inches |
Clethra alnifolia | Summersweet | 15 to 18 inches |
Cornus sericea | Red Twig Dogwood | 3 to 4 feet |
Cornus sericea 'Flaviramea' | Yellow Twig Dogwood | 3 to 4 feet |
Cotoneaster apiculata | Cranbury Cotoneaster | 12 to 18 inches |
Cotoneaster salicifolia repens | Pink Carpet Cotoneaster | 12 to 18 inches |
Euonymous alatus | Red Winged Euonymous | 3 to 4 feet |
Euonymous alatus compactus | Compact Red Winged Euonymous | 3 to 4 feet |
Fothergilla gardenia | Dwarf Fothergilla | 12 to 18 inches |
Fothergilla major | Large Fothergilla | 12 to 18 inches |
Hamamelis virginiana | Witchhazel | 4 to 5 feet |
Ilex crenata hellerei | Dwarf Japanese Holly | 18 to 24 inches |
Ilex glabra | Inkberry Holly | 18 to 24 inches |
Ilex glabra compacta | Compact Inkberry Holly | 18 to 24 inches |
Ilex verticillata | Winterberry Holly | 18 to 24 inches |
Juniperus chinensis glauca hetzi | Hetz Juniper | 2 1/2 to 3 feet |
Juniperus chinensis pfitzeriana compacta | Compact Pfitzer Juniper | 18 to 24 inches |
Juniperus chinensis torulosa | Torulosa Juniper | 4 to 5 feet |
Juniperus horizontalis bar harbor | Bar Harbor Juniper | 18 to 24 inches |
Juniperus horizontalis plumosa | Andorra Juniper | 18 to 24 inches |
Juniperus horizontalis wiltoni | Blue Rug Juniper | 18 to 24 inches |
Juniperus sargenti | Sargent Juniper | 18 to 24 inches |
Kalmia latiflora | Mountain Laurel | 2 1/2 to 3 feet |
Leucothoe axillaris | Leucothoe | 18 to 24 inches |
Magnolia soulangiana | Saucer Magnolia | 8 to 10 feet |
Magnolia stellate | Star Magnolia | 6 to 8 feet |
Magnolia virginiana | Sweetbay Magnolia | 6 to 8 feet |
Myrica pensylanica | Northern Bayberry | 4 to 5 feet |
Philadelphus x virginalis | Mock Orange | 2 to 3 feet |
Picea excels nidiformis | Birdnest Spruce | #1 can |
Pieris japonica | Japanese Andromeda | 18 to 24 inches |
Pinus mugo | Mugo Pine | 18 to 24 inches |
Potentilla fruticosa | Bush Cinquefoil | 12 to 18 inches |
Rhododendron catabienese | Catawba Rhododendron | 2 to 3 feet |
Rhododendron maximum roseum | Rosebay Rhododendron | 2 to 3 feet |
Spirea bumalda 'Anthony Waterer' | Anthony Waterer Spirea | 2 to 3 feet |
Spirea vanhouttei | Vanhoutte Spirea | 2 to 3 feet |
Thuja occidentalis nigra | Dark Americdan Arborvitae | 5 to 6 feet |
Viburnum burkwoodi | Burkwood Viburnum | 18 to 24 inches |
Viburnum carlesi | Fragrant Viburnum | 2 to 3 feet |
Viburnum dentatum | Arrowwood Viburnum | 2 to 3 feet |
Viburnum rhytidophyllum | Leatherleaf Viburnum | 5 to 6 feet |
Viburnum tomentosum | Doublefile Viburnum | 5 to 6 feet |
Minimum Illumination for Surface Parking | |||
|---|---|---|---|
Activity Type | Vehicular Traffic (footcandles) | Pedestrian Safety (footcandles) | Pedestrian Security (footcandles) |
Low activity | 0.5 | 0.2 | 0.8 |
Medium activity | 1.0 | 0.6 | 2.0 |
High activity and intersections | 2.0 | 0.9 | 4.0 |
Example: | Minimum illumination required = 0.5 fc Average to minimum ratio = (4 x 0.5) or 2.0 fc Maximum to minimum ratio = (10 x 0.5) or 5.0 fc |
Pedestrian Way Illumination Requirements | |||
|---|---|---|---|
Walkway and Bikeway Classifications | Minimum Average Level | Average Levels for Special Pedestrian Safety | |
(footcandles) | Mount Heights (9 to 15 feet) (footcandles) | Mount Heights (16 to 25 feet) (footcandles) | |
Roadside Sidewalks and Bikeways | |||
Commercial areas | 0.9 | 2.0 | 4.0 |
Other nonresidential areas | 0.6 | 1.0 | 2.0 |
Residential areas | 0.2 | 0.4 | 0.8 |
Sidewalks and Bikeways Distant from Roadways | |||
Parks, walkways and bikeways | 0.5 | 0.6 | 1.0 |
Pedestrian stairways and ramps | 0.6 | 0.8 | — |
Design Standards
Recommended Small Trees | ||
|---|---|---|
Botanical Name | Common Name | Minimum Planting Size |
Acer buergeranum | Trident Maple | 2 1/2 to 3-inch caliper |
Acer campestre | Hedge Maple | 2 1/2 to 3-inch caliper |
Acer ginnala | Amur Maple | 2 1/2 to 3-inch caliper |
Amelacnier x hydrida 'Cumulus' | Shadblow Serviceberry 'Cumulus' | 2 1/2 to 3-inch caliper |
Crataegus phaenopyrum x fastigiata | Washington Hawthorn | 2 1/2 to 3-inch caliper |
Crataegus viridis | Green Hawthorne | 2 1/2 to 3-inch caliper |
Magnolia x lobneri 'Merrill' | Merrill Magnolia | 10 to 12 feet |
Syringa reticulata | Japanese Tree Lilac | 10 to 12 feet |
Recommended Medium Trees | ||
|---|---|---|
Botanical Name | Common Name | Minimum Planting Size |
Acer rubrum 'Northwood' | Northwood Red Maple | 2 1/2 to 3-inch caliper |
Acer rubrum 'Scanlon' | Scanlon Red Maple | 2 1/2 to 3-inch caliper |
Acer saccharum 'Goldspire' | Goldspire Sugar Maple | 2 1/2 to 3-inch caliper |
Celtis bungeana | Bunge Hackberry | 2 1/2 to 3-inch caliper |
Cladratis lutea | Yellowwood | 2 1/2 to 3-inch caliper |
Caprinus carolinana | American Hornbeam | 2 1/2 to 3-inch caliper |
Phellondendron amurense | Amur Corktree | 2 1/2 to 3-inch caliper |
Tilia cordata x 'Whitehouse' | Whitehouse Linden | 2 1/2 to 3-inch caliper |
Recommended Large Street Trees | ||
|---|---|---|
Botanical Name | Common Name | Minimum Planting Size |
Acer rubrum 'October Glory' | October Glory Red Maple | 2 1/2 to 3-inch caliper |
Acer rubrum 'Red Sunset' | Red Sunset Red Maple | 2 1/2 to 3-inch caliper |
Celtis occidentalis 'Magnifica' | Magnifica Hackberry | 2 1/2 to 3-inch caliper |
Fraxinus americana 'Autumn Purple' | Autumn Purple Ash | 2 1/2 to 3-inch caliper |
Ginko biloba (male only) | Ginko | 2 1/2 to 3-inch caliper |
Plantanus acerifolia | London Planetree | 2 1/2 to 3-inch caliper |
Platanus occidentalis | Sycamore | 2 1/2 to 3-inch caliper |
Quercus coccinea | Scarlet Oak | 2 1/2 to 3-inch caliper |
Quercus marcocarpa | Bur Oak | 2 1/2 to 3-inch caliper |
Quercus phellos | Willow Oak | 2 1/2 to 3-inch caliper |
Quercus rubra | Red Oak | 2 1/2 to 3-inch caliper |
Sophora japonica 'Regent' | Regent Scholartree | 2 1/2 to 3-inch caliper |
Tilia x euchlora | Crimean Linden | 2 1/2 to 3-inch caliper |
Tilia tomentosa 'Green Mountain' | Green Mountain Silver Linden | 2 1/2 to 3-inch caliper |
Ulmus parvifolia | Chinese Elm | 2 1/2 to 3-inch caliper |
Zelkova serrata 'Village Green' | Japanese Zelkova | 2 1/2 to 3-inch caliper |
Additional Recommended Tree | ||
|---|---|---|
Botanical Name | Common Name | Minimum Planting Size |
Acer palmatun | Japanese Maple | 6 to 7 feet |
Acer Saccharum | Sugar Maple | 2 1/2 to 3-inch caliper |
Betula pendula | Weeping Birch | 12 to 14 feet |
Cedrus atlantica glauca | Blue Atlas Cedar | 6 to 8 feet |
Cercis Canadensis | Eastern Redbud | 6 to 8 feet |
Cornus kousa | Chinese Dogwood | 1-1/2 to 2-inch caliper |
Crataegus crusgalli inermis | Thornless Cockspur Hawthorn | 2 1/2 to 3-inch caliper |
Fagus grandiflora | American Beech | 2 1/2 to 3-inch caliper |
Fagus atropinicea | Copper Beech | 2 1/2 to 3-inch caliper |
Gleditsia triacanthos inermis | Thornless Honeylocust | 2 1/2 to 3-inch caliper |
Ilex Opaca | American Holly | 6 to 8 feet |
Juniperus virginiana | Eastern Red Cedar | 6 to 8 feet |
Liriodendron tulipifera | Tulip Poplar | 2 1/2 to 3-inch caliper |
Oxydendrum arboretum | Sourwood | 2 1/2 to 3-inch caliper |
Picea abies | Norway Spruce | 6 to 8 feet |
Picea omorika | Serbian Spruce | 6 to 8 feet |
Pinus thunbergiana | Japanese Black Pine | 6 to 8 feet |
Pinus virginiana | Virginia Pine | 6 to 8 feet |
Prunus cerasifera | Flowering Plum | 1-1/2 to 2-inch caliper |
Prunus serrulata | White Cherry | 1-1/2 to 2-inch caliper |
Pseudolarix kaempferi | Golden Larch | 6 to 8 feet |
Pseudotsuga menziesii | Douglas Fir | 6 to 8 feet |
Quercus acutissima | Sawtooth Oak | 2 1/2 to 3-inch caliper |
Quercus palustris | Pin Oak | 2 1/2 to 3-inch caliper |
Tilia cordata 'Greenspire' | Greenspire Linden | 2 1/2 to 3-inch caliper |
Tilia tomentosa 'Green Mountain' | Green Mountain Silver Linden | 2 1/2 to 3-inch caliper |
Recommended Shrubs | ||
|---|---|---|
Botanical Name | Common Name | Minimum Planting Size |
Abelia x grandiflora | Glossy Abelia | 18 to 24 inches |
Aronia arbtutifolia | Red Chokeberry | 2 to 3 feet |
Azalea arborescens | Sweet Azalea | 18 to 24 inches |
Azalea atlanticum 'Marydel' | Marydel Azalea | 18 to 24 inches |
Azalea cumberlandense | Cumberland Azalea | 18 to 24 inches |
Azalea 'Delaware Valley' | Delaware Valley Azalea | 18 to 24 inches |
Azalea 'Hino Crimson' | Hino Crimson Azalea | 18 to 24 inches |
Azalea 'Pennsylvania' | Pennsylvania Azalea | 18 to 24 inches |
Azalea vaseyi | Pinkshell Azalea | 18 to 24 inches |
Azalea viscosum | Swamp Azalea | 18 to 24 inches |
Clethra alnifolia | Summersweet | 15 to 18 inches |
Cornus sericea | Red Twig Dogwood | 3 to 4 feet |
Cornus sericea 'Flaviramea' | Yellow Twig Dogwood | 3 to 4 feet |
Cotoneaster apiculata | Cranbury Cotoneaster | 12 to 18 inches |
Cotoneaster salicifolia repens | Pink Carpet Cotoneaster | 12 to 18 inches |
Euonymous alatus | Red Winged Euonymous | 3 to 4 feet |
Euonymous alatus compactus | Compact Red Winged Euonymous | 3 to 4 feet |
Fothergilla gardenia | Dwarf Fothergilla | 12 to 18 inches |
Fothergilla major | Large Fothergilla | 12 to 18 inches |
Hamamelis virginiana | Witchhazel | 4 to 5 feet |
Ilex crenata hellerei | Dwarf Japanese Holly | 18 to 24 inches |
Ilex glabra | Inkberry Holly | 18 to 24 inches |
Ilex glabra compacta | Compact Inkberry Holly | 18 to 24 inches |
Ilex verticillata | Winterberry Holly | 18 to 24 inches |
Juniperus chinensis glauca hetzi | Hetz Juniper | 2 1/2 to 3 feet |
Juniperus chinensis pfitzeriana compacta | Compact Pfitzer Juniper | 18 to 24 inches |
Juniperus chinensis torulosa | Torulosa Juniper | 4 to 5 feet |
Juniperus horizontalis bar harbor | Bar Harbor Juniper | 18 to 24 inches |
Juniperus horizontalis plumosa | Andorra Juniper | 18 to 24 inches |
Juniperus horizontalis wiltoni | Blue Rug Juniper | 18 to 24 inches |
Juniperus sargenti | Sargent Juniper | 18 to 24 inches |
Kalmia latiflora | Mountain Laurel | 2 1/2 to 3 feet |
Leucothoe axillaris | Leucothoe | 18 to 24 inches |
Magnolia soulangiana | Saucer Magnolia | 8 to 10 feet |
Magnolia stellate | Star Magnolia | 6 to 8 feet |
Magnolia virginiana | Sweetbay Magnolia | 6 to 8 feet |
Myrica pensylanica | Northern Bayberry | 4 to 5 feet |
Philadelphus x virginalis | Mock Orange | 2 to 3 feet |
Picea excels nidiformis | Birdnest Spruce | #1 can |
Pieris japonica | Japanese Andromeda | 18 to 24 inches |
Pinus mugo | Mugo Pine | 18 to 24 inches |
Potentilla fruticosa | Bush Cinquefoil | 12 to 18 inches |
Rhododendron catabienese | Catawba Rhododendron | 2 to 3 feet |
Rhododendron maximum roseum | Rosebay Rhododendron | 2 to 3 feet |
Spirea bumalda 'Anthony Waterer' | Anthony Waterer Spirea | 2 to 3 feet |
Spirea vanhouttei | Vanhoutte Spirea | 2 to 3 feet |
Thuja occidentalis nigra | Dark Americdan Arborvitae | 5 to 6 feet |
Viburnum burkwoodi | Burkwood Viburnum | 18 to 24 inches |
Viburnum carlesi | Fragrant Viburnum | 2 to 3 feet |
Viburnum dentatum | Arrowwood Viburnum | 2 to 3 feet |
Viburnum rhytidophyllum | Leatherleaf Viburnum | 5 to 6 feet |
Viburnum tomentosum | Doublefile Viburnum | 5 to 6 feet |
Minimum Illumination for Surface Parking | |||
|---|---|---|---|
Activity Type | Vehicular Traffic (footcandles) | Pedestrian Safety (footcandles) | Pedestrian Security (footcandles) |
Low activity | 0.5 | 0.2 | 0.8 |
Medium activity | 1.0 | 0.6 | 2.0 |
High activity and intersections | 2.0 | 0.9 | 4.0 |
Example: | Minimum illumination required = 0.5 fc Average to minimum ratio = (4 x 0.5) or 2.0 fc Maximum to minimum ratio = (10 x 0.5) or 5.0 fc |
Pedestrian Way Illumination Requirements | |||
|---|---|---|---|
Walkway and Bikeway Classifications | Minimum Average Level | Average Levels for Special Pedestrian Safety | |
(footcandles) | Mount Heights (9 to 15 feet) (footcandles) | Mount Heights (16 to 25 feet) (footcandles) | |
Roadside Sidewalks and Bikeways | |||
Commercial areas | 0.9 | 2.0 | 4.0 |
Other nonresidential areas | 0.6 | 1.0 | 2.0 |
Residential areas | 0.2 | 0.4 | 0.8 |
Sidewalks and Bikeways Distant from Roadways | |||
Parks, walkways and bikeways | 0.5 | 0.6 | 1.0 |
Pedestrian stairways and ramps | 0.6 | 0.8 | — |