Originally Posted by northwind

All getting a little testy, isn't it?

With the statistics there, unfortunately there's a major and irreducable hygeine factor (bias)- riders who wear hi-viz are more likely to be safety conscious riders, which in itself reduces the number of accidents they'll suffer. If you take the statistics as proof, it also proves that you're less likely to have a single-vehicle accident, ie crash through rider error, if you wear hi-viz. The correlation's the same.

Not to say that it doesn't make you safer... But, just be careful with the statitstics.