Safety in Numbers? The Effect of Increasing Numbers of Bicycle Commuters on Bicycle-Automobile Collisions
Year of Award
Master of Arts (MA)
Department or School/College
Department of Economics
Douglas Dalenberg, Elizabeth Metcalf
Bicycle Commuting, Bicycle Safety, Pedestrian Safety, Safety in Numbers
University of Montana
The idea that increasing the numbers of bicycle and pedestrians in an area lowers the automobile collision risk for individual cyclists and pedestrians is called the safety in numbers effect. This paper applies the safety in numbers effect to bicycling and pedestrian commuters in California cities from 2005 to 2011. The results indicate that cities with 10% more bicycle commuters will only see about 6% more collisions between cyclists and automobiles and thus have a lower average risk to bicycle commuters. These results are similar to those found by Jacobson (2003) although this study uses a multiple regression analysis on an expanded data set.
Anderson, Luke, "Safety in Numbers? The Effect of Increasing Numbers of Bicycle Commuters on Bicycle-Automobile Collisions" (2013). Graduate Student Theses, Dissertations, & Professional Papers. 854.
© Copyright 2013 Luke Anderson