Planning sample sizes for before-after accident comparisons.

Auteur(s)
Sando, T. & Mohr, D.
Jaar
Samenvatting

Before-and-after safety studies are becoming more desirable in lieu of traditional cross-sectional studies in establishing crash modification factors, especially after the introduction of the first version of the Highway Safety Manual (2010). The authors present a simple method for estimating necessary sample sizes to obtain a target precision or power when the effect is represented as a proportional change in a Poisson rate. They also show that necessary sample sizes are not very different when full Bayesian models are implemented. (A) Reprinted with permission from Elsevier.

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Publicatie

Bibliotheeknummer
TRIS 01368730
Uitgave

Accident Analysis & Prevention. 2012 /03. Vol. 45. Pp826-827 (Tabs., Refs.)

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