Air: Correlating Transportation, Energy Efficiency, and Urban Heat Island Mitigation
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Air: Correlating Transportation, Energy Efficiency, and Urban Heat Island Mitigation






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  • This slide demonstrates just what we mean by sustainable cities from the Center for Neighborhood Technology hear in Chicago
  • Illinois Tollway: Three 1-mile sections testing open graded (porous) asphalt SMA asphalt surface, gap graded aggregate, high friction

Air: Correlating Transportation, Energy Efficiency, and Urban Heat Island Mitigation Air: Correlating Transportation, Energy Efficiency, and Urban Heat Island Mitigation Presentation Transcript

  • AIR Correlating Transportation, Energy Efficiency, and Urban Heat Island Mitigation Richard M. Daley, Mayor City of Chicago David Leopold, Project Manager Streetscape and Sustainable Design Program
  • Source:
  • Leadership: Chicago Climate Action Plan FIVE STRATEGIES
  • Corresponding Project Goals
    • Alternative Modes of Transportation
    • Urban Heat Island Effect
    • Light Pollution
    • Construction Emissions
    • Regional Materials
  • Alternative Transportation
    • Implementing the CDOT Complete Streets Policy
    • Improving facilities for pedestrians and cyclists
    • Improving access to public transportation
  • Alternative Transportation – Pedestrian Basics ADA Compliant Sidewalks and Ramps Clearly Marked Crossings
  • Alternative Transportation – Design Elements Landscaped buffers between pedestrians and traffic
  • Alternative Transportation – Design Elements Blue Island Avenue
    • Cars and Trucks parking on the existing sidewalk
  • Alternative Transportation – Design Elements Blue Island Avenue
    • Narrow sidewalk 5’ to shadow parking midblock, allowing for the addition of a bike lane
  • Alternative Transportation – Design Elements Bikeway Infrastructure
    • Providing Linkages to the Existing Bikeways Network
    • Adding parking for cyclists and bike-to-transit
  • Alternative Transportation – Design Elements Public Transportation
    • Relocating bus stops
    • Reconstructing ADA compliant bus stop areas.
  • Alternative Transportation – Design Elements Side Street Bump-Outs
    • Reduced Pedestrian Crossing Distances
    • Opportunities for Landscaping and stormwater infiltration
    • Discourage truck access to residential blocks to the North
  • Urban Heat Island Effect Goal: Reduce ambient summer temperatures on streets and sidewalks through use of reflective pavements on roadways, light colored materials on sidewalks and use of trees for shading
  • Urban Heat Island Effect 180 New trees will be planted in landscaped planters and bioswales. Planting conditions designed to optimize canopy growth
  • Urban Heat Island Effect
    • Maximize streetscape surface area in roadway, sidewalks, and plazas with minimum .29 Solar Reflective Index.
    • Permeable Pavers (over 50,000 sq ft)
      • Roadway pavers with with Photocatalytic Cement
    • Sidewalk Concrete (over 130,000 sq ft)
    • Microthin Concrete Overlay (over 100,000 sq ft)
    ½ Inch Paver Facemix
  • Photocatalytic Cement in Pavements Depollution Process on Tested Paver Samples Reduction in NO, NOx, NO2 Gases Source: Axim Technology Center
  • Air Quality Pre-Data Collection 1’ 3’ 6’ Data Points Include: NO, NO2, NOx, Wind Speed, UV
  • Energy Efficiency - Lighting
    • Achieve 49% reduction in energy use over a streetscape baseline
    • Utilize a white light source
    • Eliminate light trespass into the night sky
  • Energy Efficiency - Lighting
    • 400 W / 310 W HPS Gateway 2000 Fixtures
    • 100 W HPS Pedestrian Lights
    • 210 W/ 140 W Metal Halide Fixtures with Electronic Ballast
    • 40 W LED Pedestrian Lights
    Baseline Sustainable Streetscape Energy Savings = 49% reduction from the Baseline
  • Energy Efficiency - Lighting
    • Technology comparison to HPS.
    • Roadway pavement design used to improve uniformity and visibility for drivers and pedestrians.
    • Technology barriers experienced throughout design
    • Energy use costs vs. life cycle costing
    • Full-cut off decision-making
    • Smart fixtures
  • Construction Emissions
    • Construction Vehicles: ULSD Fuel and Idling Requirements
    • Warm Mix Asphalt Technology
    • CDOT Piloted two Warm Mix Asphalt Demonstrations in 2008 typically resulting in:
      • Temperatures more than 100 degrees lower than hot mix
      • 55% reduction in fuel consumption
      • 46% reduction in greenhouse gases
      • 58% decrease in nitrogen oxides
      • 81% drop in sulfur dioxide
  • Regional Materials
    • Attain 40% of all materials from sources within 500 miles of the project site