Sustainable Urban Development Association (SUDA)
            Welcome to SUDA
Welcome to the website of the Sustainable Urban Development Association (SUDA), a charitable corporation devoted to fostering a healthy natural environment by providing information about sustainable city-building. 
Focus on Highway 401:  The new government of Ontario has the opportunity to address the need to resolve worsening congestion on Highway 401 in the core of the Greater Toronto Area.  SUDA recommends a detailed review by the government of Ontario of an affordable rapid transit line across the northern half of Toronto that can attract enough ridership to ensure the ongoing functionality of the highway,  To see the report, click here
Feature Item: SUDA's 2016 document "Mission Critical: A Rapid Transit Network to End Congestion and Fight Climate Change" was updated in 2018.  The document proposes significant and affordable expansions to the Toronto rapid transit network. To read the report, please click here.
To view SUDA's response to concerns about road congestion at and around Pearson International Airport, please click here.
 Feature Item What to do about Toronto's Gardiner Expressway?  SUDA recommended in a report released on February 15, 2013 that the entire elevated portion of the expressway can be removed, if new rapid transit alternatives and some road modifications are put into place.  To find out more, click here to read "Transforming Transportation Across the Toronto Waterfront".
Feature Item:  The 21st century will require that urban expansion be as efficient as possible, with particular attention to urban density, the mixing of uses, and resource consumption.  To read about an example for greenfield development that achieves 100 to 135 residents and jobs per gross hectare without an emphasis on high rise living,  click here.

Your charitable donation to SUDA helps to pay our bills, and generates federal and provincial tax credits for you.  Please donate here.

Our Mission
SUDA's mission is to foster a healthy natural environment by providing information about ways in which cities can become more efficient in land, material, water and energy resources, and highly supportive of sustainable transportation.
We do this by working to increase public acceptance of the importance of sustainable urban development practices; by gathering information and undertaking limited research; and by communicating this information to targeted audiences.

 Sustainable Urban Development

Environmentally sustainable development was defined by the World Commission on Environment and Development as: "Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs."
Achieving sustainable urban communities involves understanding the interconnectedness of economy, society, and environment. A community is unsustainable if it consumes resources faster than they can be renewed, produces more waste than natural systems can safely process, and relies on distant sources for its basic needs.
One of the most important factors in building and maintaining a healthy natural environment -- and therefore our well-being -- is the kind of community in which we live. The physical forms of our cities, towns and neighborhoods, our transportation systems, and the way we use energy, material and water resources have profound effects on environmental sustainability, and on our daily lives.
Today we are facing a number of serious problems linked to unsustainable urban development. For example,

Resources of petroleum, natural gas, and other fossil fuels are in decline, and energy prices may rise rapidly in coming years.

Many of the best farm lands that North Americans depend on are being overrun by low-density suburban development. Rapid climate change threatens food production and increases the need to preserve regional farmlands.

Severe weather events caused by rapid global warming will threaten the viability of natural ecosystems. Virtually every ecosystem is in decline.

Urban growth continues to add more motor vehicles onto local and regional roads, creating pollution and congestion.

Pollution from transportation, industrial and other urban activities is affecting the lungs and general health people of all ages.