1. Washington University Transportation Emission Commuter Travel –Faculty/Staff –Students University Fleet Air Travel –Athletic Meets –Study Abroad –Faculty Air Travels

2. Annual Commuter Emission Calculation Factors effecting the emission: –# of people commuting to WashU –miles driven per year –gallons of fuel required –amount of Carbon or Carbon Dioxide produced by the fuel milesgallons 2,421 grams of Carbon/Gallon as given by the Code of Federal Regulations (40 CFR 600.113) 0.99 % fuel oxidized 12 gm C 44 gm CO 2 mileyear Emissions X = XXXX # people

3. Data Collected Student Parking Permit Data: Only 2007-08. Student Local Address Data Student Home Address Data Faculty/Staff Parking Permit Data: Only 2007-08. Faculty/Staff Local Address Zip code: Only 2007-08.

4. Issues with Data Some students provide their permanent home address zip code instead of local address zip code Each year over 3000-4000 students do not provide zip code. Historic faculty/staff local zip code not available. Historic parking permit data not available.

5. Distance within 150 miles to WashU considered for analysis. 2007-08 Data on Google Earth

6. Distance Calculation Zip code converted to latitude and longitude based on U.S. Gazetteer and zipinfo. U.S. Gazetteerzipinfo For WashU, coordinates of Brookings Hall (38.648N, 90.305W) considered. Distance from zip code coordinates to WashU coordinates calculated using the reference formula:reference formula –Δx = 69.1*(lat1-lat2); Δy = 53.0*(lon1-lon2), –Distance (in miles) = (Δx 2 +Δy 2 ) 1/2. Calculates straight line distance between WashU and centroid of zip code

7. Fudge factors required for calculated distance –Highways and road directions –Bridges on East and North St. Louis 18% for Students 40% for Faculty/Staff

8. Annual Distance Traveled Assume every person makes 1 round trip (2 trips) to school per working day of the year Faculty/Staff - 225 working days per year Students - 165 working days (excluding vacations)

9. Faculty Commuter Contribution

10. The number of students living within 150 miles of the Danforth Campus have not lead to an increase in the amount of parking permits issued as our data implied. Student Commuters

13. 1991-92 1995-96 2000-2001 2007-08 Annual miles driven per student decreased most dramatically from 2002-2007. This is explained in part by the shift in student residences from 2001-2007.

14. Student Commuter Carbon Emissions

16. University Fleet Contribution The University fleet grew and contribution steadily increased despite improvements in fuel economy, yet is minimal in comparison to student commuter carbon emissions.

17. Air Travel Emissions General areas of air travel –Faculty –Study abroad –Athletics Methodology –Faculty air travel not considered –Study abroad data was provided for the past 6 years –Athletic air travel data provided for the past 3 years

18. Air travel emissions have increased by 30%

19. Air travel emissions are the driver in this study

20. Washington University Transportation Emission