An MP in Eire has proposed that cyclists be legally obliged to have the above when out. Others in the UK have also backed said proposal, but as can be expected, it's been pretty much kicked into touch. After all, how on earth can it be enforced - ? 
However, the article did quote a 15 year Italian survey that concluded that the wearing of hi-viz and use of lights by cyclists actually made little difference to the number of cyclist / vehicle collisions.

However, the article did quote a 15 year Italian survey that concluded that the wearing of hi-viz and use of lights by cyclists actually made little difference to the number of cyclist / vehicle collisions.
