Re: ACC Question
I'm with nauti, it works pretty well and I no questions asked would have it on my GC again.
Its best in the scenario of a crowded highway/freeway where you don't face stops but traffic will be lucky to get up to your set speed or will only do so intermittently. In these cases you will traverse the entire thing without the hassle of constantly adjusting your cruise speed as you would with a fixed cruise control system. Imagine another section of highway that has maybe a half dozen lights. You'll make some lights, miss others. Sometimes they are near misses where you slowed down to some degree but didn't stop. Its still pretty good because it will require little intervention despite a small number of stops. Speaking for myself these two things cover a good chunk of my driving on the open road where I most use cruise.
You will run into some things with these systems where they work less well. Take a car turning off onto another road at right angles to the one you're on. The cruise will in some cases slow more than it needs to and I'm thinking it does this because its hedging its bets as to whether the car you are following is on the road and you are going to turn as it did or whether it has turned off. It cant really know until the car moves far enough off the road to make a decision that it has turned. This is my third system and they all did this one. Another thing is the system cant judge complex stops. Take a 40 mile an hour multi lane road in town. As you come up to a stop cars will suddenly change lanes just before stopping and that kind of thing. When you are braking yourself you will adjust on the fly to these things without a thought and make a smoother stop than the system will. Again speaking for myself I find its better to just brake to a stop myself and turn around and resume after, makes for a smoother driving experience in those situations.
Related is that they say these systems are aids and they're right. I think you will find that you are paying attention and ready to intervene when coming to a stop because you need to be. The system cant account for infinite possibilities and having your foot hovering over the brake pedal when in town and you're not quite sure whats going to happen at a given intersection is no easier than actually braking yourself. You reach a point where its easier to simply do it yourself, the system actually makes more work just as regular cruise can when in heavy(ier) traffic. I cant say where this tipping point is for you are anyone else but I do think most people will reach it at some point.
To me the bottom line is its often useful and can add real pleasure to a drive when in its element. As I said, I get it again without any reservations whatsoever.
2014 Diesel Grand Cherokee