ACC/ICC is not a safety feature in the general sense. It might be termed as a safety enhancement to cruise control, in which case it should be opt-out when ente

ACC/ICC is not a safety feature in the general sense. It might be termed as a safety enhancement to cruise control, in which case it should be opt-out when entering cruise control (which it is, in my case) and which disengages when exiting cruise control (which is done by braking, and that is well known). On ceding trust - at least with the ICC system in Nissans, it's A) far back, which gives more reaction time B) quite easy to tell when it sees the car in front vs when it doesn't. You're ceding trust, sure, but you can also verify easily. Your 'tailgate restriction' bit is effectively a more agressive form of collision warning/forward emergency braking, and FCW+FEB as far as I know is available on all or at least most vehicles with ACC/ICC. Unfortunately, the realities of city driving means that 'maintaining distance' is a goal in some cases (i.e. just got cut off, tight merges, etc) rather than an absolute directive - frankly, something trying to force me to a certain distance away from the car in front of me would be more aggravating than useful.