People often do not realise what a high proportion of deaths are caused by trauma. In fact 10% of all deaths world-wide result from trauma – more than malaria, TB and HIV/AIDS combined. By 2030 road traffic collisions alone will be the fifth highest cause of deaths in the world. Road traffic collisions are the single most common cause of death in people between 15 and 29 years of age, and leave a trail of disability, as well as death. They particularly affect emerging economies – Kenya is a classic example. Here many perish in small minibuses, called matatus, even though these vehicles are regulated. The CLAHRC WM Co-Director, Tom Marshall, found a recent RCT of about 1,000 such matatus, randomised to have, or not have, stickers displayed prominently to motivate passengers to take demonstrative action against the driver to avoid dangerous manoeuvres. Insurance claims and deaths dropped by about a half in the difference in difference analysis. Too good to be generalisable? The Director would like to replicate the study, perhaps in a factorial design – any takers?
–Richard Lilford, Director of CLAHRC WM
 World Health Organization. Injuries and violence: the facts. Geneva: World Health Organization. 2010.
 Chitere PO, Kibua TN. Efforts to improve road safety in Kenya: Achievements and limitations of reforms in the Matatu industry. Discussion Paper DP/081/2006. Nairobi: Institute of Policy Analysis and Research (IPAR). 2006.
 Habyarimana J, Jack W. Heckle and Chide: Results of a randomized road safety intervention in Kenya. J Public Econ. 2009; 95 (11-12):1438-46.