I wish my Adaptive radar cruise control did more.
Am I thinking about these 4 things correctly?

1. It's is meant for interstates I 95 etc?
2. It will not stop for a red light or backed up traffic (it may actually stop for backed up traffic as long as it does not happen very suddenly)?
3. No way it will stop for an accident or an animal the just happened right in front of you?
4. The car will run off the road on winding roads.

I want to test it to see if it stops, but it always comes in hot and I get scared and hit the brakes.

 

1. Yes
2. It will not stop for a red light. The system is designed to follow the vehicle in front of you. If there is no vehicle in front of you and you come up to stopped traffic then you have to slow the NX yourself or risk a collision.
3. If you come across something suddenly then it may warn you of an impending collision and may brake for you but depends on the situation and how big the object in front of you is. This is not something you should test. In my RX and NX I have been warned when the system detects an immediate impending collision but they haven't emergency braked for me.
4. Adaptive Cruise Control does not follow lanes and does not slow for curves.

 

I rented a Toyota Camry a few years ago and it had this feature (Adaptive Cruise Control). I was VERY impressed with this and when I bought my 2020 NX this feature was a must-have for me.
Personally, I ONLY use it for it's 'primary' intended purpose - to dynamically adjust the cruise control 'set' level when appropriate.

 

I was initially impressed when I first used it, but now it seems more like a carnival trick that is really not very useful.

 

I put this post in the wrong forum, I have a 2nd gen 350NX F sport, but I am guessing the answer is the same?

 

Older Corvettes and some imported auto brands are made from fiberglass or composite materials and have front-mounted engines.
One day, I noticed that my car closed quickly on an older model Corvette ahead. I have my ACC set for about a 2 car-length-distancing from traffic ahead.
I panic braked when I thought the ACC wasn't going to respond quickly enough, and disaster didn't happen.
Corvettes 2020 and newer IIRC, have mid-mounted engines, so I think that ACC will respond to the amount metal in the rear of those.
JMHO. YMMV.

 

Interesting. Mine has followed motorcycles without issue. I wonder if the Corvette was so low to the ground the ACC didn’t register it in that moment. Could be a factor. Hopefully, that doesn’t happen again but I’m definitely curious about it.