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Road Traffic Accidents Data Management and Analysis

Road Traffic Accidents Data Management and Analysis. Barry Storey jdt / Mott MacDonald. Road Traffic Accidents Data Management and Analysis. What Constitutes a Road Traffic Accident?

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Road Traffic Accidents Data Management and Analysis

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  1. Road Traffic AccidentsData Management and Analysis Barry Storey jdt / Mott MacDonald

  2. Road Traffic AccidentsData Management and Analysis • What Constitutes a Road Traffic Accident? • Defined as an accident on the public highway involving an injury to a person to which the police and/or the emergency services have been summoned. • Sometimes called a Person Injury Accident or P.I.A • Statutory duty on the Police and Highways Authorities to record traffic accidents

  3. Road Traffic AccidentsData Management and Analysis • How is Data Collected? • Police must record details of the accident • Details entered on ‘STATS19’ form • Separate details for vehicles and casualties • Up to 100 fields to complete • Very comprehensive record

  4. Road Traffic AccidentsData Management and Analysis STATS19 Record 1. Accident Cause Driver error Manoeuvre error Causation Factors Driver Pedestrian Vehicle Local conditions Obscuration

  5. Road Traffic AccidentsData Management and Analysis STATS19 Record 2. Location Data Road name and number Road layout Road class and type Pedestrian crossing details Junction type and control Weather and lighting conditions Road surface Carriageway hazards Ordnance survey grid reference Sketch plan showing accident details

  6. Road Traffic AccidentsData Management and Analysis STATS19 Record 3. Vehicle Information Registration number (removed by LA) Make/Model Vehicle Type Vehicle manoeuvre Impact details Skidding/overturning details Collision Type Impact and damage details

  7. Road Traffic AccidentsData Management and Analysis STATS19 Record 4. Driver Details Age/Sex Breath tested Hit and Run Address/Postcode

  8. Road Traffic AccidentsData Management and Analysis STATS19 Records 5. Casualty Details Age/Sex Severity Fatal / Serious / Slight Road user class Car driver or passenger Pedestrian cyclist Pedestrian details Location and movement Passenger details

  9. Road Traffic AccidentsData Management and Analysis The West Midlands Case Study Data collected and processed by West Midlands Police since early 1970’s First computerised by West Midlands County Council in 1974 Responsibility passed to West Midlands Joint Data Team in 1986 Currently managed by Mott MacDonald in Public/Private Partnership

  10. Road Traffic AccidentsData Management and Analysis The West Midlands Case Study 1974 - 1980 ICL Mainframe Relational Database 1980 - 1998 Mainframe unformatted flat file FORTRAN66 software Processing, Interrogation and Analysis routines 10,000 accident records per annum Networked to seven West Midlands Districts 1998 to date. PC Server Called JSYS-ACCIDENTS ACCESS database VISUAL BASIC software MAPINFO GIS interface

  11. Road Traffic AccidentsData Management and Analysis JSYS-ACCIDENTS Consists of Four Modules Data Entry and Processing Data Validation Data Interrogation Data Analysis

  12. Road Traffic AccidentsData Management and Analysis JSYS-ACCIDENTS 1. Data Entry and Processing Carried out by West Midlands Police Accidents located directly on to OS digital maps Data punched directly into PC from STATS19 using customised data entry screens Accidents located automatically using GIS tools Validation tools to ‘nudge’ accidents

  13. Road Traffic AccidentsData Management and Analysis JSYS-ACCIDENTS 2. Data Validation Carried out by Local Authority staff (jdt) Add local highway features junction numbering link numbering pedestrian crossings road kilometrage Accident updates and edits Scanned accident diagrams Masterfile updates.

  14. Road Traffic AccidentsData Management and Analysis JSYS-ACCIDENTS 3. Data Interrogation Single accident by accident number by selection within GIS window Multiple Accident Selection by Location by junction reference number by road name and number by kilometrage by selected links by selected area within polygon

  15. Road Traffic AccidentsData Management and Analysis JSYS-ACCIDENTS 3. Data Interrogation - continued Multiple Accident Selection by Description Severity Causation Age Lighting Location etc. etc.

  16. Road Traffic AccidentsData Management and Analysis JSYS-ACCIDENTS 4. Data Analysis Network Analysis Trend Analysis Blacksite Analysis Density Analysis Cluster Analysis

  17. Road Traffic AccidentsData Management and Analysis JSYS-ACCIDENTS Data Output and Presentation Text Output Single line output Full English Summary Matrix output Graphical Output ‘Stick’ Diagrams Graphs, Pie-Charts etc Mapping Output Density Plots Dot Distributions Multiple Accident Plots

  18. Road Traffic AccidentsData Management and Analysis Uses for Accident Data Systems Identification of Accident Black-Spots Analysis of Causal Factors Specific Accident Problems Identification of accident frequencies and locations by specific accident type Trend analysis and monitoring

  19. Road Traffic AccidentsData Management and Analysis Uses for Accident Data Accident Remedial Measures Traffic Management Measures Traffic Calming Specific junction and link treatments Traffic Safety Audits In other words Making Roads Safer

  20. Road Traffic AccidentsData Management and Analysis- Processing Module

  21. Road Traffic AccidentsData Management and Analysis- Accident Diagram

  22. Road Traffic AccidentsData Management and Analysis-‘Stick Diagram’

  23. Road Traffic AccidentsData Management and Analysis- Summary of Accidents

  24. Road Traffic AccidentsData Management and Analysis- Accidents by Type

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