Surrogate measures of safety and traffic conflict observations
bookPart
This chapter focuses on surrogate measures of safety (primarily, traffic conflicts) as a tool for site safety analysis. While the traditional approach is to measure safety in terms of number of accidents, the word surrogate implies that other non-accident-based indicators are being used. The chapter briefly describes the theory underpinning surrogate safety measures. Practical guidance focuses primarily on conducting traffic conflict observations, although there are other ways to collect and analyse surrogate safety data. The main reason for selecting this approach is that applying more advanced methods inevitably requires fully automated tools that can collect accurate data on road user speeds and trajectories. While such tools exist, they are still in development and are not always available to the practitioner. In contrast, traffic conflict observations can be completed using less sophisticated tools in the simplest case, using only trained human observers. Examples of the method's use in road safety studies are provided, along with recommendations for further reading.
TNO Identifier
843481
ISBN
9789089130648
Publisher
Hasselt University, Belgium
Source title
How to analyse accident causation? A handbook with focus on vulnerable road users
Editor(s)
Polders, E.
Brijs, T.
Brijs, T.
Collation
33 p.
Place of publication
Hasselt, Belgium
Pages
93-126
Files
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