Annual Sustainability Report 2010 - Parsons Brinckerhoff
Annual Sustainability Report 2010 - Parsons Brinckerhoff
Annual Sustainability Report 2010 - Parsons Brinckerhoff
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Appendix: Travel Emissions Breakdown<br />
BUSINESS TRAVEL<br />
<strong>Parsons</strong> <strong>Brinckerhoff</strong>‟s internal business systems and <strong>Parsons</strong> <strong>Brinckerhoff</strong>‟s external travel providers‟<br />
were interrogated to provide data on business travel.<br />
The general formula illustrated in Equation 1 was used to estimate the GHG emissions associated<br />
with business travel (and commuting).<br />
Equation 1: General formula for estimating travel emissions<br />
Where:<br />
Distance travelled was estimated from business systems and from data provided by corporate<br />
travel management companies.<br />
Conversion factors were taken from „<strong>2010</strong> Guidelines to Defra / DECC's GHG Conversion<br />
Factors for Company <strong>Report</strong>ing v1.2.1‟<br />
Table 1: Emissions associated with business travel<br />
Mode 2009 Emissions (tonnes CO 2 e) <strong>2010</strong> Emissions (tonnes CO 2 e)<br />
Air 3,221 2,446<br />
Rail 32 8<br />
Road (Hire Car) 164 425<br />
Road (Private car) 216 246<br />
Road (Taxi / bus) 31 23<br />
Total 3,664 3,148<br />
COMMUTING<br />
An electronic survey was used to collect commuting-related data from staff. The survey was carried<br />
out over the period 25 Feb to 11 Mar 2011 and received 1,184 responses (46% of staff).<br />
The general formula presented in Equation (1) was used, where:<br />
Distance travelled was estimated from the home and office postcodes<br />
<strong>Annual</strong> <strong>Sustainability</strong> <strong>Report</strong> <strong>2010</strong><br />
<strong>Parsons</strong> <strong>Brinckerhoff</strong> P a g e | 33
Change language