When is it best to use flashing lights versus non-flashing up front? I don't want to blind oncoming drivers, but I want to see and be seen. Is there a rule of thumb, or is it just my preference?
Some people may not agree with me but as a driver or an observer of other cyclists I think a flashing light is more visible and more indicative that you are a bicycle. As a cyclist I need a steady light to see by.
Personally I use both. My flashing light is not a bright as my steady light and my steady light is pointed at the ground so that it is not blinding people.
"Sharing the road means getting along, not getting ahead" - 1994 Washington State Driver's Guide
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I agree with this. While reading through this thread, I was remembering a couple of instances when, while driving, I noticed a cyclist with flashing red lights clipped to the back of his/her jersey. It was a clearly visible sight, and it got my attention because it wasn't anything I was used to seeing on the road. I wondered what in the world it was - and I got in the other lane and watched out for it and then was able to pass safely. As a cyclist, that's what you want.