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How does a modal shift from short car trips to cycling affect road safety?
1Ministry of Infrastructure and the Environment, Centre for Transport and Navigation, PO Box 5044, 2600 GA Delft, The Netherlands. paul.schepers@rws.nl
Accident; Analysis and Prevention
|October 9, 2012
Summary
Shifting short car trips to cycling in the Netherlands may not change traffic fatalities but increases serious injuries. This is due to more cycling-only crashes, despite fewer cars posing risks and the safety in numbers effect for cyclists.
Area of Science:
- Transportation safety
- Public health
- Urban planning
Background:
- Governments promote cycling to reduce car use, but road safety concerns persist.
- Understanding the road safety impact of modal shift is crucial for policy development.
Purpose of the Study:
- To examine the road safety impact of shifting short car trips to cycling in Dutch municipalities.
- To estimate the effects of modal split changes on fatalities and serious injuries.
Main Methods:
- Development of Accident Prediction Models (APMs) using Negative Binomial regression.
- Utilizing municipal crash and mobility data to model non-linear risk.
- Estimating effects by comparing current modal splits with existing ones.
Main Results:
- Modal shift from cars to bicycles did not significantly alter the number of fatalities.
- A notable increase in serious road injuries was observed.
- Increased injuries are primarily from single-cyclist crashes, not car-cyclist collisions.
Conclusions:
- While cyclist fatalities may not increase due to reduced car presence and "safety in numbers," serious injuries rise.
- The impact of modal shift is age-dependent and can be mitigated by safety interventions for cyclists.
- Policy implications suggest a need for targeted safety measures to address increased cycling injuries.
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