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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

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Page 1: Design Guidelines for - Credit Valley Conservation · 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:

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

Page 2: Design Guidelines for - Credit Valley Conservation · 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:

• Why? concerns about negative impactsnew policies and standardsformalize standard practice

• Who? interdivisional city staff teamdesign, transportation, water, zoning, environment, forestry

Developing the Guidelines 2006

Page 3: Design Guidelines for - Credit Valley Conservation · 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:

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

Page 4: Design Guidelines for - Credit Valley Conservation · 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:

1.0 Introduction2.0 Purpose and Objectives3.0 How and Where the Guidelines Apply4.0 Design Guidelines5.0 Diagrams6.0 Appendices

‘Greening’ Guidelines Structure

Page 5: Design Guidelines for - Credit Valley Conservation · 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:

Urban Design streetscape, pedestrian realm, landscape

Environment urban heat island, stormwater, sustainability

Key Problem Areas

‘Greening’ Guidelines 1.0 Introduction

Page 6: Design Guidelines for - Credit Valley Conservation · 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:

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

Page 7: Design Guidelines for - Credit Valley Conservation · 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:

‘Greening’ Guidelines 3.0 How and Where the Guidelines Apply

• Apply to the design, review and approval of all new development with surface parking

Page 8: Design Guidelines for - Credit Valley Conservation · 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:

‘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

Page 9: Design Guidelines for - Credit Valley Conservation · 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:

4.4 Landscaping4.4.1 General Requirements

4.4.2 Streetscape and Perimeter Landscaping

4.4.3 Internal Landscaping

4.4.4 Surfaces

Page 10: Design Guidelines for - Credit Valley Conservation · 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:

4.5 Stormwater Management4.5.1 General Requirements

4.5.2 Snow Storage

Page 11: Design Guidelines for - Credit Valley Conservation · 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:

Absorbent Landscapes“double-duty” spaces achieve urban design and water balance objectives

4.5 Stormwater Management

Page 12: Design Guidelines for - Credit Valley Conservation · 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:

Light Colour Porous Pavementsassist infiltration, water balance, water temperature reduction

4.5 Stormwater Management

Page 13: Design Guidelines for - Credit Valley Conservation · 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:

Structural Soil Systemstree canopy and underground soil trenches filter, store, evapotranspire

4.5 Stormwater Management

Page 14: Design Guidelines for - Credit Valley Conservation · 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:

Shade Canopies and Solar PVstree alternative for constrained sites, power generating & stormwater collection opportunity

4.5 Stormwater Management

Page 15: Design Guidelines for - Credit Valley Conservation · 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:

• 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

http://www.toronto.ca/planning/urbdesign/greening_parking_lots.htm
Page 16: Design Guidelines for - Credit Valley Conservation · 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:

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

Page 17: Design Guidelines for - Credit Valley Conservation · 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:

Implementation 2008-present

• Test and apply during development reviewover 150 Site Plan Applications in 2008/09 with 20 or more surface parking spaces

Page 18: Design Guidelines for - Credit Valley Conservation · 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:

Implementation Outcomes

• Tree planting targets achieved (1:5 Ratio)

1 tree planted for every 5 spaces supplied

Page 19: Design Guidelines for - Credit Valley Conservation · 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:

Implementation Outcomes

• Better streetscapes, edges & screening

Page 20: Design Guidelines for - Credit Valley Conservation · 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:

Implementation Outcomes

• Wider islands and pedestrian medians

Page 21: Design Guidelines for - Credit Valley Conservation · 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:

Implementation Outcomes

• Increased onsite stormwater managementconcrete paving

porous pavers

bioretention

Page 22: Design Guidelines for - Credit Valley Conservation · 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:

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

Page 23: Design Guidelines for - Credit Valley Conservation · 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:

Implementation Challenges

• Permeable pavers – cost, maintenance

decorative, pressed, high-albedo asphalt

permeable pavers

gaps to clean and fill

Page 24: Design Guidelines for - Credit Valley Conservation · 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:

Implementation Challenges

• Permeable pavers – grading

good

Page 25: Design Guidelines for - Credit Valley Conservation · 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:

Implementation Challenges

• Permeable pavers – grading

maximize benefit placing at lowest points on site

better

Page 26: Design Guidelines for - Credit Valley Conservation · 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:

Implementation Challenges

• Bio-retention – openings and grading

keep openings wide and clear, slope site toward openings

Page 27: Design Guidelines for - Credit Valley Conservation · 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:

Implementation Challenges

• Bio-retention – landscape and litter

avoid unruly and sparse plantings, weeds prosper

litter magnet, maintenance required

Page 28: Design Guidelines for - Credit Valley Conservation · 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:

Implementation Challenges

• Bio-retention – unplanned/incompatible activity

urban agriculture and parking run-off…

Page 29: Design Guidelines for - Credit Valley Conservation · 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:

Questions Comments

contact Allison Reid, Urban Designer [email protected]


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