Washington University Transportation Emission

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Washington University Transportation Emission

• Commuter Travel
• Faculty/Staff
• Students
• University Fleet
• Air Travel
• Athletic Meets
• Study Abroad
• Faculty Air Travels

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Annual Commuter Emission Calculation
X
X
X
X
people

• 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

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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.

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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.

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2007-08 Data on Google Earth

• Distance within 150 miles to WashU considered for
  analysis.

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Distance Calculation

• Zip code converted to latitude and longitude
  based on U.S. Gazetteer and zipinfo.
• For WashU, coordinates of Brookings Hall
  (38.648N, 90.305W) considered.
• Distance from zip code coordinates to WashU
  coordinates calculated using the reference
  formula
• ?x 69.1(lat1-lat2) ?y 53.0(lon1-lon2),
• Distance (in miles) (?x2?y2) 1/2.
• Calculates straight line distance between WashU
  and centroid of zip code

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

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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)

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Faculty Commuter Contribution
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Student Commuters
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.
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1991-92
1995-96
2000-2001
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.
2007-08
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Student Commuter Carbon Emissions
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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.
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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

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• Air travel emissions have increased by 30

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• Air travel emissions are the driver in this study

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Washington University Transportation Emission