I flash mine until I see them stop completely. I watch them until I do…. You can see cars slowing down and knowing wether or not they are gonna stop. Nose of the vehicle dipping… I also use placement to judge their speed. Pick a spot in the road and another decently further back… If they close that distance faster then you think it should take if they were to slow… get prepared to bail, or jet out…. you may not have to but best be ready.
No way is this full proof … but anything that keeps you safe is that much more. Whatever you do …watch your rear until you see a stopped vehicle.
Yesterday is a memory, tomorrow is a prediction, but today…… is a Bi**h
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