After too many years driving airside (before and after the vest plague) I've long thought that hi vis vests make drivers complacent. I don't recall more people being squashed before they were inflicted on us, including people in dark blue overalls. Some companies now have a rule that they have to be worn even inside a vehicle, presumably because they work better than airbags
.
I
have wondered about the effectiveness of a hi-vis vest that's covered in several gallons of grease, coffee stains and mysterious goo (you all know who you are
).
The ultimate result of shielding men from the effects of folly is to fill the world with fools. (Herbert Spencer, 1820 - 1903)