Cleaner and Quieter Vehicles and Cleaner Fuels
In-service vehicle testing programme
Research report on the in-service emissions testing of light duty passenger vehicles.
Effects of Emerging Vehicle Technologies on emissions not currently regulated
This document analyses data emissions obtained by testing four cars that have used different types of new exhaust after treatment technologies. The analysis focuses on data from vehicle emissions not currently regulated.
Euro 3 LPG Retrofit Emissions Factor Testing
A report prepared for the Department for Transport by Tickford Powertrain Test Limited comparing the emissions factors of vehicles running on petrol and on Liquefied Petroleum Gas.
Economics of Bus Drivelines
This report presents the findings of the likely capital cost of drive-lines components and its impact on pollutants during inner city operation.
- Published:
- 27 June 2005
International resource costs of biodiesel and bioethanol
This report examines the range of feedstocks, processing routes and distribution options for biodiesel and bioethanol in both 2002 and 2020, including where intermediate products are imported to and processed in the UK.
- Published:
- 26 January 2006
Platinum and hydrogen for fuel cell vehicles
This independent report presents a short study on hydrogen and fuel cells focusing on the key issues of likely future platinum availability and cost, hydrogen resource costs and atmospheric impacts of hydrogen.
- Published:
- 26 January 2006
'Carbon to Hydrogen' Roadmaps for passenger cars - Update
An update on the study of the evolution of low-carbon technology. The study looked at options to further reduce CO2 emissions in passenger cars, by improvements in vehicle technology and its interaction with new fuels.
- Published:
- 25 October 2005
Motorcycle exhaust emissions factors and test cycles programme - final report (7 Mb)
This reports describes the assessment of performance and exhaust emissions for motorcycles over three different emission drive cycles.
- Published:
- 26 October 2007
- Last update:
- 22 October 2008
Archived content
The following content is available from the Department for Transport web archive .
- Carbon to hydrogen roadmaps for passenger cars (PDF - 9216 KB)
- DfT biofuels evaluation of emissions performance from vegetable oil fuel (PDF - 2048 KB)
- Emissions factors for Euro III cars
- Emission factors 2003 final report
- Emissions factors for Euro II and III diesel light goods vehicles
- An examination of vehicle noise test procedures
- Fuelling road transport: implications for energy policy (PDF - 680 KB)
- Harmonise prediction model for road traffic noise
- Liquid Biofuels and Renewable Hydrogen to 2050
- On Board Emissions Measurement System Research Report (PDF - 2048 KB)
- Tyre/road noise - Assessment of the existing and proposed tyre noise limits
Help accessing downloadable file formats
Most publications are available in portable document format (PDF) or rich text format (RTF) for downloading and reading offline. PDF files may only be compatible with the latest version of the free Adobe Acrobat Reader .
People with visual difficulties may find it useful to learn about improving the accessibility of Acrobat documents at the Adobe Accessibility Resource Centre .
For information about RTF and zip files please visit help with downloads.
If you are unable to access a publication, please contact us to organise a suitable alternative format.

External website
Pop-up window
Rich text format file
Adobe PDF file
Word file
Excel file
WinZip file