Greenways in the United States

Greenways in the United States
Name	Greenways in the United States
Established	Various
Location	United States

Contents

Greenways in the United States are corridors of protected open space that connect parks, natural areas, cultural sites, and communities across urban, suburban, and rural landscapes. Greenways integrate transportation, recreation, conservation, and heritage by linking resources such as the National Park Service, Trust for Public Land, Rails-to-Trails Conservancy, Land Trust Alliance, and local park agencies. They have evolved through federal initiatives like the National Trails System Act and municipal programs such as the Rails-to-Trails Conservancy projects, reflecting collaborations among organizations including the Christopher Reeve Foundation, American Planning Association, Nature Conservancy, and regional authorities.

History and development

Early antecedents include the urban park movement led by figures like Frederick Law Olmsted and projects such as Central Park (New York City), which inspired linear park concepts embraced by agencies like the National Park Service and nonprofits such as the Trust for Public Land. Mid-20th century infrastructure expansion prompted grassroots responses from groups like the Rails-to-Trails Conservancy and the Sierra Club, leading to legislative milestones such as the National Trails System Act and initiatives supported by the Land and Water Conservation Fund. The late 20th and early 21st centuries saw municipal programs in cities like Portland, Oregon, Minneapolis, Chicago, Atlanta, and New York City integrate greenways into urban renewal plans led by agencies such as the U.S. Department of Transportation and professional bodies like the American Institute of Architects and the American Planning Association.

Greenways take multiple forms: urban linear parks exemplified by projects such as the High Line (New York City), multiuse regional trails like the Great Allegheny Passage, riparian corridors along rivers including the Schuylkill River Trail and Anacostia Riverwalk Trail, and rails-to-trails conversions like the Katy Trail State Park (Missouri). Uses include recreational bicycling and walking promoted by organizations such as the League of American Bicyclists and America Walks, habitat connectivity supported by the Nature Conservancy and the U.S. Fish and Wildlife Service, stormwater management practices used by municipalities including Seattle and Philadelphia, and cultural heritage interpretation led by institutions such as the Smithsonian Institution and local historical societies.

Design integrates landscape architecture traditions from practitioners influenced by Frederick Law Olmsted and firms such as Sasaki Associates and Michael Van Valkenburgh Associates, incorporating principles promoted by the American Society of Landscape Architects and the Congress for the New Urbanism. Effective corridors balance habitat connectivity endorsed by the U.S. Fish and Wildlife Service, multimodal access championed by the U.S. Department of Transportation and the Rails-to-Trails Conservancy, public safety guidelines from agencies like the National Park Service and the Centers for Disease Control and Prevention, and community input processes used by municipal bodies including Portland Bureau of Transportation and county planning commissions. Techniques include green infrastructure approaches developed with guidance from the EPA and stormwater design used in projects by the Natural Resources Defense Council and local water authorities.

Notable networks include the East Coast Greenway linking cities from Maine to Florida and coordinated by the East Coast Greenway Alliance, the Great American Rail-Trail championed by the Rails-to-Trails Conservancy, and the Pacific Crest Trail administered by the National Park Service and volunteers from the Pacific Crest Trail Association. City-scale exemplars include the High Line (New York City), the Minneapolis Grand Rounds, the Atlanta BeltLine, the Chicago 606, the San Antonio River Walk, and the Los Angeles River revitalization efforts supported by entities like the Los Angeles County Metropolitan Transportation Authority and local conservancies. State examples include Katy Trail State Park (Missouri), Silver Comet Trail (Georgia), Greenbelt (Maryland), and networks managed by state agencies such as the California Department of Parks and Recreation and the New York State Office of Parks, Recreation and Historic Preservation.

Environmental benefits cited by the EPA, the Nature Conservancy, and academic institutions like Harvard University and University of California, Berkeley include improved biodiversity corridors, enhanced water quality through riparian restoration, and urban heat island mitigation. Social impacts studied by scholars at Columbia University, Rutgers University, and policy groups like the Brookings Institution highlight increased recreational access, public health gains reported by the Centers for Disease Control and Prevention, and potential issues of displacement and equity raised by advocates such as the Urban Land Institute and PolicyLink. Case studies from Portland, Oregon, Philadelphia, Baltimore, and New Orleans illustrate trade-offs between economic development spurred by greenways and community stabilization strategies promoted by local housing authorities and nonprofit partners like the Local Initiatives Support Corporation.

Governance models range from municipal park departments like the New York City Department of Parks and Recreation and the Chicago Park District to public-private partnerships involving entities such as the Trust for Public Land, the Conservation Fund, and corporate donors including foundations like the Robert Wood Johnson Foundation. Funding blends federal grants from programs administered by the National Park Service and the U.S. Department of Transportation, state appropriations from agencies such as the California Coastal Conservancy, philanthropic contributions from institutions like the Ford Foundation and the Kresge Foundation, and local financing tools including tax increment financing used by city redevelopment agencies. Management practices engage volunteer stewards coordinated by organizations such as Friends of the High Line, trail associations like the Appalachian Trail Conservancy, and municipal operations overseen by parks departments, conservancies, and regional land trusts including the Land Trust Alliance.

Category:Greenways