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Methodological guidelines for developing accident modification functions.

Rune Elvik1

  • 1Institute of Transport Economics, Gaustadalleen 21, NO-0349 Oslo, Norway; Department of Civil Engineering, Aalborg University, Sofiendalsvej 11, DK-9210 Aalborg SV, Denmark.

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This study outlines ten methodological guidelines for creating accident modification functions, which quantify road safety measure effectiveness. Adhering to these guidelines, while challenging, is crucial for robust road safety research.

Keywords:
Accident modification functionEvaluation studiesGuidelinesMethodsRoad safety

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Area of Science:

  • Road safety
  • Traffic engineering
  • Statistical modeling

Background:

  • Accident modification functions (AMFs) are essential for evaluating road safety measures.
  • Developing reliable AMFs requires standardized methodologies.
  • Current limitations hinder the development of AMFs for many safety interventions.

Purpose of the Study:

  • To propose methodological guidelines for developing accident modification functions.
  • To provide a framework for consistent and rigorous AMF creation.
  • To address the challenges in current AMF development.

Main Methods:

  • Development of ten methodological guidelines.
  • Illustrative example of guideline application.
  • Emphasis on exploratory analysis and iterative development.

Main Results:

  • A set of ten guidelines for AMF development is presented.
  • An example demonstrates the practical application of these guidelines.
  • The study highlights the difficulty but importance of strict guideline adherence.

Conclusions:

  • The proposed guidelines offer a structured approach to AMF development.
  • Improved methodologies are needed to overcome limitations like scarce evaluation studies and effect estimate variability.
  • Further research and data are required to expand the applicability of AMFs to more road safety measures.