Originally Posted by Miele Man

I see your flag but... But a flag often blows fore and aft whilst the bicycle is in motion and thus is invisible to folwing vehicles. How about a large Slow moving Vehicle triangle behind your seat?

On an upright bicycle full fenders couples with mudflaps really cut down the wheel thrown spray especially in standing water or heavy rain.

One thing about super bright lights especially strobes is that they can temporarily blind other bicyclist or motorists. this is moreso the darker and the less ambient light there is. I've had numerous times on dark/poorly lighted roads where an aproaching bicyclist with a very bright light (especially one on strobe mode) blinded me to the point where I had to slam on the brakes of my bicycle because I could no longer even see where the road was.

Cheers