Citation: Wilkinson , P , Edwards , P , Steinbach , R , Petticrew , M , Goodman , A , Jones , A J H , Roberts , H , Kelly , C , Nellthorpe , J & Green , J 2011 , The health impact of free bus travel for young people in London : protocol for an observational study . Occasional Papers in Transport and Health , no. 2 , London School of Hygiene and Tropical Medicine , London .
The extension, in September 2005, of free bus and tram travel in London to people 12-16 years of age and, in September 2006, to people under 18 years is likely to have had a range of impacts with implications for public health. The ‘On the Buses’ project aims to evaluate these impacts using a mixed method quasi-experimental design. This paper describes the protocol for the analyses of quantitative data for the study.