Defensive driving and the external costs of accidents and travel delays

A unified model of accident and travel-delay costs describes the role that defensive driving effort plays in balancing these costs, and the costs of effort itself. This motivates a simple method for jointly estimating risk, effort, and travel-delay externalities, which exploits ordinary travel-deman...

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Bibliographic Details
Published in:Transportation research. Part B: methodological 2008-11, Vol.42 (9), p.703-724
Main Author: Steimetz, Seiji S.C.
Format: Article
Language:English
Subjects:
Accidents
Applied sciences
Congestion pricing
Exact sciences and technology
Externalities
Ground, air and sea transportation, marine construction
Road transportation and traffic
Transportation planning, management and economics
Travel delays
Value of time
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Summary:A unified model of accident and travel-delay costs describes the role that defensive driving effort plays in balancing these costs, and the costs of effort itself. This motivates a simple method for jointly estimating risk, effort, and travel-delay externalities, which exploits ordinary travel-demand modeling to directly value the congestion that generates these costs. A unique empirical setting also allows for decomposing the joint externality into its travel-delay and accident-related components, with results suggesting that together risk and effort externalities are nearly on par with travel-delay externalities. It is also demonstrated that traditional value-of-time estimates substantially reflect risk and effort costs.
ISSN:0191-2615
1879-2367
DOI:10.1016/j.trb.2008.01.007