The problem with that ingenious idea and the metre long things with scratchy ends is that it stops the cyclist from filtering or just going close to stationary cars. Mind you, there are plenty of people who don’t seem to understand the difference between a cyclist passing a car with only inches of room, and a car doing the same to a cyclist.
Dunno about the scratch pole but my sprayer setup wouldn't stop filtering. It sprays out.
Configure it so it only activates if the speed differential is higher than filtering speed, job done.
Obviously not a serious idea, it's just crossed my mind a couple of times.
The problem with that ingenious idea and the metre long things with scratchy ends is that it stops the cyclist from filtering or just going close to stationary cars. Mind you, there are plenty of people who don’t seem to understand the difference between a cyclist passing a car with only inches of room, and a car doing the same to a cyclist.