Originally Posted by
UniChris
That would only make sense if it were electric; you might at some point see some experimentation with a sort of rugged e-bike in that role, but an idling performance type internal combustion engine just doesn't fit the 99% of the time that is being eyes, ears, and approachable presence, for which an upright posture on a rigid frame mountain bike works wonderfully.
I hear what you are saying, and agree to an extent. Small displacement motorcycles, say around 125cc have very low idling sound. But, I agree, anything mechanized like that is not quite as approachable, but certainly more approachable than a cop car. Bikes and maybe eventually ebikes are probably the most approachable, and as others have said gives the cops more range.