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Design Guidelines for ‘Greening’
Surface Parking Lots S e p t e m b e r 2 8, 2 0 1 0
Session A LID Implementation Tools: Industrial,
Commercial, Institutional and Multi Family
Allison Reid, Urban Designer
• Why? concerns about negative impactsnew policies and standardsformalize standard practice
• Who? interdivisional city staff teamdesign, transportation, water, zoning, environment, forestry
Developing the Guidelines 2006
plant trees
provide good quality soil and generous landscaped areas
enhance pedestrian and cycling infrastructure
manage stormwater on-site
reduce the urban heat island effect
use sustainable materials and technologies
‘Greening’ Guidelines Objectives
1.0 Introduction2.0 Purpose and Objectives3.0 How and Where the Guidelines Apply4.0 Design Guidelines5.0 Diagrams6.0 Appendices
‘Greening’ Guidelines Structure
Urban Design streetscape, pedestrian realm, landscape
Environment urban heat island, stormwater, sustainability
Key Problem Areas
‘Greening’ Guidelines 1.0 Introduction
To implement:Official Plan policy
3.1 Built Environment & 3.4 Natural Environment
Toronto Green Standard performance targets
‘Greening’ Objectives plant trees, manage stormwater onsite… etc.
‘Greening’ Guidelines 2.0 Purpose & Objectives
‘Greening’ Guidelines 3.0 How and Where the Guidelines Apply
• Apply to the design, review and approval of all new development with surface parking
‘Greening’ Guidelines 4.0 Design Guidelines
4.1 Location and Layout4.2 Vehicle Access and Circulation4.3 Pedestrian Access and Circulation4.4 Landscaping4.5 Stormwater Management
4.4 Landscaping4.4.1 General Requirements
4.4.2 Streetscape and Perimeter Landscaping
4.4.3 Internal Landscaping
4.4.4 Surfaces
4.5 Stormwater Management4.5.1 General Requirements
4.5.2 Snow Storage
Absorbent Landscapes“double-duty” spaces achieve urban design and water balance objectives
4.5 Stormwater Management
Light Colour Porous Pavementsassist infiltration, water balance, water temperature reduction
4.5 Stormwater Management
Structural Soil Systemstree canopy and underground soil trenches filter, store, evapotranspire
4.5 Stormwater Management
Shade Canopies and Solar PVstree alternative for constrained sites, power generating & stormwater collection opportunity
4.5 Stormwater Management
• City Council approved draft November 2007
• Apply to design, review, approval of all development applications with surface parking
www.toronto.ca/planning/urbdesign/greening_parking_lots.htm
Council Approval 2007
Training and Outreach 2007-09• joint presentations
1. Toronto Green Standard tier 1 targets mandatory January 31, 2010
2. Wet Weather Flow Management Master Plan & Guidelines
3. Design Guidelines for ‘Greening’ Surface Parking Lots
Implementation 2008-present
• Test and apply during development reviewover 150 Site Plan Applications in 2008/09 with 20 or more surface parking spaces
Implementation Outcomes
• Tree planting targets achieved (1:5 Ratio)
1 tree planted for every 5 spaces supplied
Implementation Outcomes
• Better streetscapes, edges & screening
Implementation Outcomes
• Wider islands and pedestrian medians
Implementation Outcomes
• Increased onsite stormwater managementconcrete paving
porous pavers
bioretention
Implementation 2008-present
• Test and apply during development reviewover 150 Site Plan Applications in 2008/09 with 20 or more surface parking spaces
• Toronto Parking Authority projects ‘Greening’ pilots with stormwater management focus
Ossington St. Clair Bonar Place
Implementation Challenges
• Permeable pavers – cost, maintenance
decorative, pressed, high-albedo asphalt
permeable pavers
gaps to clean and fill
Implementation Challenges
• Permeable pavers – grading
good
Implementation Challenges
• Permeable pavers – grading
maximize benefit placing at lowest points on site
better
Implementation Challenges
• Bio-retention – openings and grading
keep openings wide and clear, slope site toward openings
Implementation Challenges
• Bio-retention – landscape and litter
avoid unruly and sparse plantings, weeds prosper
litter magnet, maintenance required
Implementation Challenges
• Bio-retention – unplanned/incompatible activity
urban agriculture and parking run-off…
Questions Comments
contact Allison Reid, Urban Designer [email protected]