In Road Traffic Safety
Safety in numbers is also used to describe the evidence that a motorist is less likely to collide with a pedestrian or cyclist as the numbers of pedestrians or bicyclists increase. This non-linear relationship was first shown at intersections. A Public Health Consultant showed this non-linear relationship also occurs at in cities and countries using ecologic data from cities in California and Denmark, and European countries, and time-series data for the United Kingdom and the Netherlands. He termed this relationship "safety in numbers."
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