Home

Español | Français

---

Introduction

Objectives

Participants

Activities

Methodology

Workshop

Results

---

---

Tools

From the methodological level, the approach to the work is based on three fundamental elements:

1. Objective analysis of the road accident data quality (no answer error or missing data; measurement or answering error; fidelity error and coverage or representativeness error) and application and validation of evaluation procedures of data quality: Inspection of univariate and bivariate distributions; deterministic or logical contrasts – testings to detect impossible or incompatible data – and approximate testings (empiric or probabilistic), of which purpose is to track unlikely data. An attempt to specify the lack of representativeness will be done by means of 'indirect' indicators like particular anomalies in the annual distributions or ratio depending on several variables (age, seriousness…) but they will always be compared with 'typical' reference standards that are nationwide or worldwide established.
2. Evaluation from the experts, with the assistance of the municipal technical experts, of the procedures, tools and analysis outputs currently used.
3. Seminars of experts and technical experts from each municipality: Report and development of recommendations for each particular case.

---

Analysis

In the analysis, the following aspects will be evaluated:

Definitions and regulations

Normative and operative criteria that, in practice, are used to establish which TA are susceptible to be considered in the statistical records. The operative definition will be compared, for each particular case, with the national existing one (DGT) and the one used in CARE.

Adaptation of the data collection system

• The TA accident report
• The computer system of data entry and storage (databases)
• The availability, accessibility and quality of other complementary data (intensity of traffic data, data from insurance companies, road work accident data, data from the emergency and hospital departments)
• The working procedures (data collection and processing)
• The coordination with other aspects of the police intervention (testimonials, technical and legal reports, etc.)

Data quality

• Analysis of the under reporting degree
• Analysis of missing data and reliability of the information (errors, inconsistencies…), with particular attention to critical aspects:
  • Place of the TA
  • Seriousness of the injuries
  • Alcohol consumption
  • Use of safety devices
  • Speed
  • Information on vulnerable users (pedestrians and cyclists)
  • Reasons and factors involved in the accidents

Exploitation and analysis of the information:

• Data processing
• Statistical exploitation of the data: outputs
• Importance and usability of the information collected to improve road safety

---

Development and application of the improvement advices.

The aspects considered in this phase, for each city, depend on the results of the previous phases. However, taking into account the experience and background knowledge of the research team, it is considered that improvements on several points are possible:

• Adequacy and homogenization of the registration criteria
• Improve the data entry procedures
• Improve the questionnaire to record the data
• Improve the computer system that processes and analyses road accident data in the following aspects:
  • Definition of the data tables, relation criteria between the tables, information fields and codification of the different values corresponding to the fields.
  • Definition of possible systems of optimization and quality control of the process: data automation, filter systems, error check…
  • Establishment of several 'outputs' or data analysis that the system could automatically or semi-automatically offer: contingency tables, graphics, indexes, statistical tests…
• Train the responsible technical staff on the use of the system that processes and analyses the accident data.
• Possibilities of taking advantage of other data files (hospitals, emergency services, insurance companies…) by means of the linking data procedure.
• Introduce the GIS.

---

Application and assesment of the ‘best practices'

In collaboration and in accordance with the local administrators and technical experts, the application of several improvement measures will be carried out in each municipality. In the same way, and after an application period of one year, the quality of the results will be assessed. In this assessment, the analysis of the cost - benefit of the improvement action implemented will be particularly taken into consideration.