Calculating carbon from travel David McGuigan

2 Key travel areas  commuting to work/study by staff and students  other non-commuting staff and student travel  fleet travel (eg estates management, mail runs)

3 Why calculate carbon emissions?  to provide baseline information  to allow for effective travel planning  to allow for monitoring effectiveness of measures by repeat surveys

4 How to calculate carbon emissions  survey of staff and students on commuting  disaggregate by campus/department  ask about usual one-way trip to work/study  ask about attendance  ask about travel mode(s)  ask about distances  ask anything else you want

5 The calculation  calculate one-way carbon emission for each mode used: distance * emission rate  add the emissions for each mode  double for daily emissions  annualise using attendance information

6 Sample of carbon emission rates Mode kg of CO 2 per mile or per passenger mile% of small car Motorcycle0.0249% Bus % Train0.0249% Taxi0.2382% Petrol, medium, car % Petrol, large, car % Diesel, medium, car0.1968%

7 Growthing up  relate responses to populations  calculate growth factor (ideally disaggregated by campus and status of respondent)  add growth factor as a new field to each individual survey record  sum growth factors to create carbon footprints for whole college/university and other disaggregations

8 Example of growth factor calculation SchoolFG/UGPopulationResponsesGrowth Factor M & VMPG1, M & VMUG2, S & EPG1, S & EUG H & SCPG H & SCUG10,9481, Total-25,0083,

9 Sample of carbon emissions by campus Location Weighted Count Average distance (miles) Estimated CO 2 / year (tonnes) Average estimated CO 2 / year per staff member (tonnes) Easter Bush Pollock Halls of Residence Western General Hospital NRIE / QMRI, Little France Central Area3, , King’s Buildings / Royal Observatory1, Other location Moray House / Holyrood Road Summerhall Other NHS sites New College / Mylne's Court Total ,

10 Web-based surveys  are less expensive  avoid routeing errors  allow immediate feedback to respondent  encourage better response rates for some survey types/respondents  are more environmentally friendly

11 Example Survey