Scottish Transport Statistics No 30: 2011 Edition

Table 5.15 UK Carbon Dioxide emissions: grams per passenger-kilometre, 2010¹
	grams of CO₂ per pass-km
Petrol cars	132²
Diesel cars	123²
All Cars (average)	129²
Petrol motorbike	119
Bus	135
Coach	31
National rail	57
Light rail and tram	77
Ferry	116
Domestic flights³	172⁴
Short haul international³	97⁴
Long haul international³	113⁴

Source: DEFRA - Not National Statistics
1. Sources: Figures are taken from the 2009 Guidelines to Defra/DECC's Conversion Factors to Company Reporting, 2009, Defra/DECC. All figures are estimated using data for GB/UK as a whole so do not specifically relate to Scotland.
2. All Car figures assume an average car occupancy rate of 1.6 passengers (Carbon Pathways Analysis, 2008, Department for Transport)
3. The long haul estimate is based on a flight length from the Guidelines of of 6482 km, short haul 1108km and domestic 463km.
4. In keeping with evidence from the IPCC, a 9% upflift factor has been applied to allow for sub-optimal routing and stacking at airports during periods of heavy congestion