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


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

  1. 1. 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
  2. 2. Source:
  3. 3. Leadership: Chicago Climate Action Plan FIVE STRATEGIES
  4. 4. Corresponding Project Goals <ul><li>Alternative Modes of Transportation </li></ul><ul><li>Urban Heat Island Effect </li></ul><ul><li>Light Pollution </li></ul><ul><li>Construction Emissions </li></ul><ul><li>Regional Materials </li></ul>
  5. 5. Alternative Transportation <ul><li>Implementing the CDOT Complete Streets Policy </li></ul><ul><li>Improving facilities for pedestrians and cyclists </li></ul><ul><li>Improving access to public transportation </li></ul>
  6. 6. Alternative Transportation – Pedestrian Basics ADA Compliant Sidewalks and Ramps Clearly Marked Crossings
  7. 7. Alternative Transportation – Design Elements Landscaped buffers between pedestrians and traffic
  8. 8. Alternative Transportation – Design Elements Blue Island Avenue <ul><li>Cars and Trucks parking on the existing sidewalk </li></ul>5’
  9. 9. Alternative Transportation – Design Elements Blue Island Avenue <ul><li>Narrow sidewalk 5’ to shadow parking midblock, allowing for the addition of a bike lane </li></ul>
  10. 10. Alternative Transportation – Design Elements Bikeway Infrastructure <ul><li>Providing Linkages to the Existing Bikeways Network </li></ul><ul><li>Adding parking for cyclists and bike-to-transit </li></ul>
  11. 11. Alternative Transportation – Design Elements Public Transportation <ul><li>Relocating bus stops </li></ul><ul><li>Reconstructing ADA compliant bus stop areas. </li></ul>
  12. 12. Alternative Transportation – Design Elements Side Street Bump-Outs <ul><li>Reduced Pedestrian Crossing Distances </li></ul><ul><li>Opportunities for Landscaping and stormwater infiltration </li></ul><ul><li>Discourage truck access to residential blocks to the North </li></ul>
  13. 13. 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
  14. 14. Urban Heat Island Effect 180 New trees will be planted in landscaped planters and bioswales. Planting conditions designed to optimize canopy growth
  15. 15. Urban Heat Island Effect <ul><li>Maximize streetscape surface area in roadway, sidewalks, and plazas with minimum .29 Solar Reflective Index. </li></ul><ul><li>Permeable Pavers (over 50,000 sq ft) </li></ul><ul><ul><li>Roadway pavers with with Photocatalytic Cement </li></ul></ul><ul><li>Sidewalk Concrete (over 130,000 sq ft) </li></ul><ul><li>Microthin Concrete Overlay (over 100,000 sq ft) </li></ul>½ Inch Paver Facemix
  16. 16. Photocatalytic Cement in Pavements Depollution Process on Tested Paver Samples Reduction in NO, NOx, NO2 Gases Source: Axim Technology Center
  17. 17. Air Quality Pre-Data Collection 1’ 3’ 6’ Data Points Include: NO, NO2, NOx, Wind Speed, UV
  18. 18. Energy Efficiency - Lighting <ul><li>Achieve 49% reduction in energy use over a streetscape baseline </li></ul><ul><li>Utilize a white light source </li></ul><ul><li>Eliminate light trespass into the night sky </li></ul>
  19. 19. Energy Efficiency - Lighting <ul><li>400 W / 310 W HPS Gateway 2000 Fixtures </li></ul><ul><li>100 W HPS Pedestrian Lights </li></ul><ul><li>210 W/ 140 W Metal Halide Fixtures with Electronic Ballast </li></ul><ul><li>40 W LED Pedestrian Lights </li></ul>Baseline Sustainable Streetscape Energy Savings = 49% reduction from the Baseline
  20. 20. Energy Efficiency - Lighting <ul><li>Technology comparison to HPS. </li></ul><ul><li>Roadway pavement design used to improve uniformity and visibility for drivers and pedestrians. </li></ul><ul><li>Technology barriers experienced throughout design </li></ul><ul><li>Energy use costs vs. life cycle costing </li></ul><ul><li>Full-cut off decision-making </li></ul><ul><li>Smart fixtures </li></ul>
  21. 21. Construction Emissions <ul><li>Construction Vehicles: ULSD Fuel and Idling Requirements </li></ul><ul><li>Warm Mix Asphalt Technology </li></ul>
  22. 22. <ul><li>CDOT Piloted two Warm Mix Asphalt Demonstrations in 2008 typically resulting in: </li></ul><ul><ul><li>Temperatures more than 100 degrees lower than hot mix </li></ul></ul><ul><ul><li>55% reduction in fuel consumption </li></ul></ul><ul><ul><li>46% reduction in greenhouse gases </li></ul></ul><ul><ul><li>58% decrease in nitrogen oxides </li></ul></ul><ul><ul><li>81% drop in sulfur dioxide </li></ul></ul>
  23. 23. Regional Materials <ul><li>Attain 40% of all materials from sources within 500 miles of the project site </li></ul>