Clifford Thames / Cardiff University
Environmental Rating for Vehicles

The Environmental Rating for Vehicles (ERV) has been jointly developed by Clifford Thames Ltd. and the ESRC Centre for Business Relationships, Accountability, Sustainability and Society (BRASS). Vehicle ratings are determined using publicly available emissions data combined with vehicle size and weight, with a higher rating indicating a lower overall environmental impact.

• Best and worst vehicles overall
• Best and worst vehicles by class
• Interactive tool
  

For full details of the background to this model and the methodology employed, you can download a copy of the CAIR/Clifford Thames briefing paper.

• ERV Briefing Paper