This oft-quoted study at the University of Bath in England: http://www.bath.ac.uk/news/articles/archive/overtaking110906.html http://www.bath.ac.uk/news/articl

This oft-quoted study at the University of Bath in England: http://www.bath.ac.uk/news/articles/archive/overtaking110906.html http://www.bath.ac.uk/news/articles/archive/overtaking110906... I'd like to see a more extensive study, although my own experience of using a helmet and hi-viz clothing seems to confirm, some motorists see the gear and think "experienced cyclist, I can pass closer".