I use my radar detector to let me know when to SPEED UP! I don't want to get caught driving below the "minimum" speed limit. But I hear you about the CB. I am a little behind equipping all my vehicles with CBs. I think a CB antenna will have minimal effect (although SOME) on aero compared to the usefulness. As slow as I drive, I doubt it will have ANY affect on aero!
I have a very old Whistler, but it still does the trick.
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