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Improving our road safety data

Joining the Dots 2019 aims to improve the quality and value of Stats19 data through modernization, streamlining, and better use of technology. This review will develop a new Stats19 specification and roadmap for future data enrichment, addressing issues such as completeness, underreporting, online reporting, recording of casualties, consistency of variables, methodology, and dissemination.

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Improving our road safety data

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  1. Improving our road safety data Stats19 review and severity reporting Delphine Robineau – Head of Road Safety Statistics, Department for Transport Joining the Dots 2019 - Improving our road safety data

  2. Joining the Dots 2019 - Improving our road safety data

  3. Stats19 reviews • A periodical process to review the quality and value of Stats19 data Joining the Dots 2019 - Improving our road safety data

  4. The aim of this review • Review the value and quality of the Stats19 data collected • Reduce the burden for front line collecting data through modernising and streamlining where possible • Consider the scope and opportunities for better use of technology, data sharing and matching to modernise road casualty data • From the work above, develop the new Stats19 specification • From the work above, develop a roadmap for future data which would enrich the understanding of road safety Joining the Dots 2019 - Improving our road safety data

  5. The current review timetable Joining the Dots 2019 - Improving our road safety data

  6. 6 packages Joining the Dots 2019 - Improving our road safety data

  7. Completeness and quality of collisions data Should we capture, or estimate, the number of damage only collisions? How much underreporting is there for slight injuries? How can we improve how forces record slight injuries? How can we collect better data on collisions location? Should we collect data on collisions which occur on private roads? How does the introduction of online reporting impact Stats19? Joining the Dots 2019 - Improving our road safety data

  8. The scale of underreporting Estimates of non-fatal road casualties derived from National Travel Survey • Very few, if any, road accident fatalities are not reported by the police. • However, a considerable proportion of non-fatal casualties are not known to the police. • Comparisons with other sources suggests that: • Level: the police reported road casualty data is only a subset • Trends: there would seem to be a reduction in injury accidents in the latest year thousands high low Joining the Dots 2019 - Improving our road safety data

  9. The impact of online reporting • Online reporting aims to make it easier for members of the public to report collisions to the police • Adopted by some forces already, more to come through Home Office led project • It impacts: • The number of collisions reported • The nature of collisions reported • The quality of the data reported Joining the Dots 2019 - Improving our road safety data

  10. Expanding the recording of casualties Should suicides be in the scope of Stats19? Should deliberate acts of violence be in the scope of Stats19? Joining the Dots 2019 - Improving our road safety data

  11. Consistency of variables in Stats19 How much does it cost to forces to collect Stats19 data? How do police officers and back office staff fill in Stats19 forms? Is contributory factor data fit for purpose? Are Stats19 response options defined properly? Joining the Dots 2019 - Improving our road safety data

  12. Methodology, data processing and dissemination How should severity be recorded? How can we account for changes in reporting systems? What language should we be using in our publications? How can we make our publications easier to navigate? How can the data flow more efficiently from forces to DfT? What data is sensitive and what data should we make open? Joining the Dots 2019 - Improving our road safety data

  13. Background on severity reporting • 2008 review: improve classification of injury severity by removing subjectivity • DfT commissioned research to advise on a practical way to achieve this • This was based on a review of road traffic injuries from hospital data and was published in a feasibility study • Recommended use of 20 injuries list which map to severity • Expected to be more accurate as removes subjectivity • Adopted in CRASH and COPA Joining the Dots 2019 - Improving our road safety data

  14. Severity based assessment Injury based assessment used in CRASH and COPA Very Serious Moderately Serious Less Serious Joining the Dots 2019 - Improving our road safety data

  15. Joining the Dots 2019 - Improving our road safety data

  16. How can we adjust for this change? • DfT commissioned the Methodology Advisory Service from the Office for National Statistics to explore methods to adjust for the change in reporting • Interim report published alongside our annual release in September • Aim: adjust series for serious and slight injuries, but also any possible breakdown. Estimate totals as if all forces were using injury-based reporting. • Two methods explored: time series analysis and regression analysis. Joining the Dots 2019 - Improving our road safety data

  17. Joining the Dots 2019 - Improving our road safety data

  18. TS = time series method Logistic Joining the Dots 2019 - Improving our road safety data

  19. What is next? • Finalising the model on 2017 data and getting the methodological approach reviewed • Update to 2018 and roll out on published material • Review the injury-based approach through our matching with hospital data • Consider whether this justifies a recommendation for all police forces to use a unified approach in terms of injury reporting (not IT systems) • After which, adjustments might no longer be needed Joining the Dots 2019 - Improving our road safety data

  20. Stats19 future data strategy What other datasets could we link with Stats19 to get more insight? How could we automatically populate some Stats19 fields? How can we reduce reporting burden? What further data could be available in the future? How could we collect data in the future? Joining the Dots 2019 - Improving our road safety data

  21. Final proposals a new Stats19 specification What does all of this actually mean??? a forward look plan Joining the Dots 2019 - Improving our road safety data

  22. Way forward and user engagement Summer 2019: engagement with police, LAs, devolved administrations Early 2020: formal consultation with all users Joining the Dots 2019 - Improving our road safety data

  23. Thank you Contact Stats19review@dft.gov.uk Roadacc.stats@dft.gov.uk Links Our latest publication for 2017 The MAS ONS methodology paper Joining the Dots 2019 - Improving our road safety data

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