This volume presents detailed statistics about the circumstances of personal injury road accidents. Some 50 data items are collected by the police STATS19 system for each accident, including the time and location of the accident, the types of vehicles involved and what they were doing at the time of the accident, as well as some information on the drivers and casualties involved. In 2009 there was a reported total of 222,146 casualties of all severities (4 per cent lower than 2009). Of those, 2,222 people were killed in road accidents, 316 fewer (12 per cent lower) than in 2008. It has long been known that a considerable proportion of non-fatal injury accidents are not reported to the police and the current best estimate is that the total number of road casualties in Great Britain each year is around 700,000. In addition to the detailed tables there are seven articles containing further analysis on specific road safety topics: an overview and trends in the police data; valuation of road accidents and casualties; drinking and driving; contributory factors in road accidents; survey data on road traffic accidents, including an overall estimate of total casualties; hospital admissions data on road casualties; road safety research. The statistics in STATS19 were reviewed recently and some changes recommended. Also, a new electronic police accident reporting system, CRASH, for secure collection, validation, transmission and storage of road traffic collision reports, is to be introduced in 2011 and 2012.