theres only been one occasion its made me worried, a kia stringer, not too sure what happened but it didnt register it as a car and i waited till the last second and slammed on the brakes. Definitely would have plowed right into it.

 

I bet it would have worked on a Kia STINGER

 

I tried it on a trip from Toronto to Niagara. It worked but scared the **** out of me. I think the anxiety I've got with it on outweighs the benefit haha

I'll just stick to old school manual driving!

 

I’m curious if your experience was the same as mine; what model were you driving when this happened & what exactly did happen? I was on a gradual curve on interstate highway & the stupid sensors picked up a slower moving semi in another lane & slammed into the brakes! My 2016 RX doesn’t have adaptive cruise & I don’t want it! I’m normally all about tech, but this scared the crap out me too!

 

My wife's Pilot will do that occasionally on curvy roads with oncoming traffic, although it's very brief. The projected BRAKE warning flashes, but quickly goes away. Unnerving, nonetheless. I haven't had it happen with my '20 RX yet.

I do generally like adaptive cruise for highway driving. Using it in stop-n-go traffic would be a difficult adjustment for me. One of the annoyances of adaptive cruise is that it will lull you into complacency about your speed. Several times I've set it to 75mph and come upon a slower vehicle. Some minutes later I realize I'm cruising along at, say, 65mph, not my intended speed. This isn't unique to the RX, though; I had the same experience on other vehicles with adaptive cruise.

 

This wasn’t oncoming traffic, it was all going in the same direction. If the roads had been wet or another vehicle close behind me, it could have been ugly. The technology is heavily flawed. I am extremely against anything that supersedes human cognition & reaction. I don’t want a self driving car or plane. I will not own an Alexa. As technological as I am, I draw the line on machines replacing my judgement.

 

No nothing like that. It did what it was supposed to do... but the feeling of "letting go" and trusting it to brake just felt so foreign and uncomfortable to me. I do wonder how it would handle winding/curved roads and people suddenly cutting in front of you - I don't even want to find out.

 

I've done 80,000 km in mine, most of it on freeway type roads and have found the system works extremely well. Maybe twice it's slowed when it's seen a truck in the next lane, but you learn to work with the system.

Remember any of these electronic systems are AIDS only, you should still be paying attention. With trucks I see them, I'm aware the car may see the truck too, the first sign of the car reacting I give it a tiny bit of throttle, that stops the car braking and the "issue" is passed.

The system works so seamlessly that you don't notice when you come up behind a slower vehicle and you, a few minutes later, realise you're going 10 under the preset speed.

 

Glad to know it's not just me!

 

Agreed. My first ACC experience was our 2012 Infiniti Q56. I was impressed w/ this feature then and remain so w/ my ‘20 Rx450.

 

Perhaps this has already been answered previously, but can you turn off the adaptive part & just use regular cruise? I have no desire to use this garbage until it’s perfected.

 

Yes sir, you can.

 

Yep, all you have to do is hold the On/Off button at the end of the cruise control stalk for more than a second and it'll engage in regular cruise mode.

 

Adaptive cruise control on the highway at higher speeds is fine. The 2020 RX has lane tracing too so you can even have your hands off for a short period of time and the car will drive semi-autonomously. It's pretty neat when you're trying to do something with both hands such as switching from sunglasses to glasses or vice versa. However, it's not that great on curves or with badly drawn lines.

As for adaptive cruise control in stop and go traffic, I found the 2020 RX to be terrible. The main issue is that braking is usually sudden and jarring. It is nowhere near as refined as say the Subaru Eyesight system. It will brake too harshly in most instances. The system also does not seem to be customizable to set the manner of acceleration. For Subaru, they had several levels such as eco, regular, etc. Therefore, I find myself usually disengaging the ACC by tapping on the brakes and bringing the car to a stop myself in stop and go traffic.

ACC also disengaged itself once on the highway in the winter due to presumable ice or snow buildup on the sensor. However, I wasn't able to just turn on regular cruise control. Does anyone know a workaround?

 

Agreed on the adaptive cruise in stop-and-go traffic. I also have a very rough downshift with my transmission at higher speeds going from 5th gear to 4th so compound that with the jarring brakes and it makes for an extremely uncomfortable ride. It almost feels like I'm in some amusement ride.

You can turn on the regular cruise by holding the ON/OFF button at the end of the cruise control stalk. You'll notice the cruise control indicator change in the instrument cluster.