1. CAST, 2000. An Evaluation of the Walking Bus at Pirehill First School: A report for the Staffordshire Walking Bus Partnership. The Centre for Alternative and Sustainable Transport, Staffordshire University.
2. Department for Transport, 2000. Guidance on the Methodology for Multi-Modal Studies. Available at http://www.dft.gov.uk/itwp/mms/index.htm.
3. Department for Transport, 2001a. Integrated Transport Economics and Appraisal: New Approach to Appraisal. Available at http://www.roads.dft.gov.uk/roadnetwork/heta/hetacoba.htm.
4. Department for Transport, 2001b. Levels of activity relating to school travel plans and initiatives (2001). Available at http://www.local-transport.dft.gov.uk/schooltravel/travelplan/index.htm.
5. Department of the Environment, Transport and the Regions, 1999. School Travel: Strategies and Plans, published by the Department of the Environment, Transport and the Regions, London.