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Area of Science:

  • Transportation Engineering
  • Road Safety Analysis

Background:

  • Highway and traffic engineering decisions critically impact road user safety.
  • Current practices often rely on 'engineering judgment' for critical decisions.

Purpose of the Study:

  • To evaluate the extent to which engineering judgment in highway design is informed by safety evidence.
  • To assess the balance between safety considerations and utility in engineering decisions.

Main Methods:

  • Analysis of guiding documents in highway and traffic engineering practice.
  • Assessment of the integration of evidence-based safety anticipation into engineering judgment.

Main Results:

  • Engineering judgment in highway and traffic engineering is frequently not informed by evidence-based safety anticipation.
  • The balance between safety and other utility dimensions is often suboptimal.

Conclusions:

  • There is a significant gap between desired evidence-based practice and current highway engineering decision-making.
  • The findings necessitate a re-evaluation of training and practices to improve road safety outcomes.