The colored vest thing.. I am not so sure about this and here is my half baked reasoning..
When you see one of the day-glo vests, you typically think of a highway worker or a scooter rider.. slow, harmless objects (at least to a car).. I think we are anything but..
..
+1
Most of the time cars turn in front off you and I don’t think they can see enough of the vest over the wind screen to really stand out. IMO