§ Lord Taylor of Warwick
asked Her Majesty' Government:
What assessment they have made of the fuel efficiency per passenger of:
- road transport;
- rail transport;
- air transport; and
- water transport. [HL3423]
§ Lord Davies of Oldham:
The fuel efficiency of alternative modes of transport is presented in tabular form below. The data come from the 2002 National Atmospheric Emissions Inventory (NAEI). Two data types are provided for ease of comparison, CO2 per passenger kilometre and kilo joules (kJ) per passenger kilometre, and are expressed using assumed load factors, not per seat.70WA
Transport mode Load factor passengers/vehicle CO2 grams of CO2/passenger km Energy consumption kJ/passenger km Mopeds 1.08 75 1,133 Motorcycle 94 1,407 Petrol cars 1.56 110 1.653 Diesel cars 106 1,535 All cars average 109 1,634 Buses (national) 9 76 1,106 Passenger rail (diesel) 90 41 589 Passenger rail (electric) 56 465 Passenger rail (average UK electric and diesel) 49 524 Air long haul approx. 300 110 1,614 Air short haul approx. 100 180 2,640 grams CO2/ship km kJ/ship km Marine—roll on roll off ferry See note 83,000 1,155,786
The road transport factors are based on National Atmospheric Emissions Inventory (NAEI) estimates of CO2 emissions by vehicle type in 2002 and combined with road passenger kilometres taken from the 2002 Transport Statistics for Great Britain.
Rail factors are also based on NAEI factors for diesel trains and power station emissions. These data were combined with Department of Trade and Industry data on electricity used for electric rail traction and the Department for Transport's statistics on rail passenger kilometres. AEA Technology provided estimates on the split between diesel and electric train kilometres.
Air factors are taken from DETR's Company GHG Reporting Manual 1999. Please note that long-haul journeys refer to average journeys of 6,500 km and short-haul refers to journeys of around 500 km.
There is no agreed methodology for allocating energy consumed between passengers and freight carried on water transport. The figures for water transport are for a roll-on-roll-off ferry expressed in grams CO2 and kJ per ship km, since many passenger ships carry both passengers and freight.