Green Roads Minnesota Pavement Conference. 2 Country or Group Tonnes oil equivalent/capita/year...
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Transcript of Green Roads Minnesota Pavement Conference. 2 Country or Group Tonnes oil equivalent/capita/year...
Green Roads
Minnesota Pavement Conference
2
Country or Group
Tonnes oil equivalent/capita/year
India 0.6
China 1.3
EU (25) 3.6
US 7.8
3
4
Roads use a lot of materials every year.
Individual materials Amount Used per Year Cost per Year
Virgin aggregate 1,300 million tons $10 billion
Asphalt 40 million tons $13 billion
Cement 10 million tons $1 billion
Total 1,350 million tons $24 billion
Conglomerate materials Amount Used per Year Cost in Place
Hot mix asphalt (HMA) 600 million tons $36 billion
Portland cement concrete (PCC) 60 million tons $6 billion
Total 660 million tons $42 billion
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Energy costs serious money.
From Wall Street Journal, 3 Jan 2008, p.A1.
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SR 20 through North Cascades National Park, WAOctavia Blvd., San Francisco, CA
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There is a strong case for sustainable practices in transportation making a big difference.
2007 Little Green Data Book (World Bank)
Residential21%
Commercial18%
Industrial32%
Transportation29%
2006 U.S. Energy Use
Transportation Energy Data Book (U.S. DOE)
Transportation20%
Other11%
Electricity & Heat36%
Agriculture8%
Other Fuel Combustion
13%
Manufacturing& Construction
12%
2000 CO2 Emissions by SourceIndustrialized Countries
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More specifically, sustainable choices in transportation construction can make a big difference.
2006 Non-Residential Construction Spending from the U.S. Census Bureau
$18 billion
$55 billion
$76 billion
$40 billion
$86 billion
$8 billion
$8 billion
$18 billion
$22 billion
$39 billion
$27 billion
$72 billion
$23 billion
$15 billion
$5 billion
$34 billion
$0 $10 $20 $30 $40 $50 $60 $70 $80 $90 $100
Lodging
Office
Commercial
Health care
Educational
Religious
Public safety
Amusement and recreation
Communication
Power
Transportation
Highway and street
Sewage and waste disposal
Water supply
Conservation and development
Manufacturing
Construction Put-in-Place (billions of dollars)
$100 billion
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SustainabilityGoal Sustain economic prosperity and a high quality of life for all while protecting the natural systems of the planet.
Key Components •Economic•Environmental•Social
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Support for sustainability everywhere.
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Making Sense of Sustainability:Green Roads Rating Standard
What is it?A rating system designed to distinguish high-performance sustainable new or redesigned/rehabilitated roads.
What does it do?It awards credits for approved sustainable choices and can be used to certify projects based on total point value.
How does it help?Provides a straightforward means of understanding and quantifying sustainability in roadway design and construction.
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LEED(Leadership in Energy and Environmental Design)
LEED certification standards– New Commercial Construction and Major Renovation Projects– Multiple Buildings and On-Campus Building Projects– Existing Building Operations and Maintenance– Commercial Interiors Projects– Core and Shell Development Projects– Homes– Neighborhood Development– Schools
A “…nationally accepted benchmark for the design, construction, and operation of high performance green buildings. LEED gives building owners and operators the tools they need to have an immediate and measurable impact on their buildings’ performance.”
-U.S. Green Building Council
LEED for new construction buildings
Distributionby geography
1-1920-4950-99100-199200+
94
91111
69
125
2582
4028 14
8
134
186480
22
23
57
19
66
18
73
10222
11
19
12079
11936
52
74
95
173
17433105
61 2712
9 (DE) 38 (DC)
23 (DE)
24 (NH)
5 (OK)
4
68AK=10HI=16PR=1
as of 07/06
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Green Roads is a rating system designed to distinguish high-performance sustainable new or redesigned/rehabilitated roads.
It awards credits for approved sustainable choices/practices and can be used to certify projects based on point value.
TransNow, CH2M Hill, University of Toledo, Sowing Green
Developing Partnerships
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Green Roads Categories
Category Goal Credits
Sustainable Design Reduce impacts due to design choices including the road alignment. 10
Material & Resources Reduce impacts from material extraction, processing and transport. 11
Stormwater Management Reduce impacts of polluted stormwater and treatment devices. 8
Energy & Environmental Control Improve human and wildlife health. 12
Construction Activities Reduce impacts from construction activities. 9
Innovation Encourage innovation in design. 4
Total 54
Description Credits
Construction Waste Management 1
Reuse of Pavement 2
Recycled Content 4
Pavement Life Cycle Analysis 3
Regionally Provided Material 1
Total Credits Available 11
Materials & Resources (MR)
17
Construction Waste Management
18
We have done well recycling HMA and PCC as part of road construction.
Asphalt and Concrete Recycled 1999 to 2004
Graph from the Washington State Department of Ecology
HMA/PCC recycling = 51% of diverted waste
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But we can do better.
6% from recycled aggregate
94% from virgin aggregate
Origins of the 3.2 billion tons/yr of aggregate used in the U.S.
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We can reduce the amount to landfills, and increase the amount to high-value surfacings.
HMA27%
Base Material53%
Landfill20%
Destination of Recovered HMA Destination of Recovered PCC
HMA/PCC12%
Fill, Rip-Rap and Other
14%
Base Material54%
Landfill20%
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Example MR Credit
Recycled Content Credits 4One credit: Use recycled content to a minimum of 20% in the HMA/PCC and 40% of the total material in the structure if base course is included in the project.
Two credits: Use recycled content to a minimum of 30% in the HMA/PCC and 50% of the total material in the structure if base course is included in the project.
Three credits: Use recycled content to a minimum of 40% in the HMA/PCC and 60% of the total material in the structure if base course is included in the project.
Four credits: Use recycled content to a minimum of 50% in the HMA/PCC and 70% of the total material in the structure if base course is included in the project.
Description Credits
Reduced Diesel Emissions 1
Reduced Fossil Fuel Dependency 1
Temporary Stormwater Control 1
Noise Mitigation Planning 1
Paving Emissions 1
Construction Quality 2
Quality Process 2
Total Credits Available 9
Construction Activities (CA)
23
Certification Levels
19-25 credits 26-31 credits 32-37 credits 38+ credits
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25
Benefits
• More sustainable roads• Specific benefits:
– Provide a system which defines basic roadway sustainability attributes– Allow a greater audience to participate in roadway sustainability in a
meaningful way– Allow sustainability tradeoffs and decisions to be made in a
systematic manner– Provide means for sustainability assessment– Confer marketable recognition on sustainable roadway project– Allow for sustainability innovation because it is end-result oriented
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Where do we go from here?• Fully develop each item• Calibrate rating system• Get industry/agency participation
See on Pavement Interactivehttp://pavementinteractive.org/index.php?title=UW:Green_Roads