Safety in numbers
Safety in numbers is also used to describe the  following evidence: The number of pedestrians or cyclists correlates inversely with the risk of a motorist colliding with a pedestrian or cyclist. This non-linear relationship was first shown at intersections. Ecologic data from cities in California and Denmark, and European countries, as well as time-series data for the United Kingdom and the Netherlands confirmed it. The number of pedestrians or bicyclists injured increases at a slower rate than would be expected based on their numbers. That is, more people walk or cycle where the risk to the individual pedestrian or bicyclist is lower. A 2002 study looked at the question whether pedestrian risk decreased with pedestrian flow. The study used 1983-86 data from signalized intersections in a town in Canada. It found that in some cases pedestrian flow increased where the risk per pedestrian decreased.