There are a few places you should go if you have internet access at home, and get hold of these resources.
The first is to the OCR exam board site. We are doing the Pilot GCSE, but OCR also offer a syllabus 'C' option called the 'Bristol Project'.
Download the JANUARY 2007 RESOURCE BOOKLET and TEACHERS NOTES, which are on the theme of Sustainable Transport and has some VERY useful information.
Then go to the GLOBAL EYE site for 2004, with a focus on Traffic.