This is a companion report to 20mph Zones on Road Safety in London. The study evaluates the effect of 20 mph zones on inequalities in road traffic casualties in London. It covers issues such as areas of deprivation and ethnic minority populations; levels of deprivation; ethnic minority casualties; differential effects in areas by level of deprivation; and potential reductions in casualty inequalities from future expansion in the number of 20 mph zones. The findings suggest overall socioeconomic inequalities have been increasing across London over the period 1987-2006. Implications for policy and practice are addressed. To continue to reduce road traffic casualties, it is still worthwhile implementing 20 mph zones in eligible areas, but to successfully reduce inequalities in casualties, other strategies will also be needed. Further research is needed to identify why 20 mph zones appear to be less effective in reducing casualties for some groups, and to explore the impact of other methods for reducing traffic speed and volume.
Abstract