How much snow would cause it to deactivate? How about heavy rain? Notice anything about the collision avoidance being turned off?
Years ago, driving in Vermont or NH, a crazy downpour just about cut visibility to 10 feet. I was on a side of a mountain and did not dare to pull over. Stopping altogether risked getting rear-ended. This would a situation for the dcc or collision avoidance would be perfect.

 

Recently I was driving my RX in a terrible downpour. The visibility was so bad that lots of cars had their hazards on. (I know it is illegal in many places and people are saying it is more dangerous. But in that situation, I could barely see the car in front of me, even with his hazards on. So I believe the hazard lights did help.) I could not see the lane markers clearly either. But the steering wheel did vibrate a couple of times because I was out of the lane.

 

With RCC on and traffic slowing significantly in front (10mph or more decrease in speed), do the RX's brake lights come on to alert drivers behind you if you let the system slow the car down (driver does not depress brake pedal)? I would think they would to prevent a pile up behind you but didn't see it called out in owners manual.

 

From the Owners Manual Page 305,
I tested and it did stop. However I do not think it can be used on stop and go situation even if you are willing to resume the cruising manually. The vehicle-to-vehicle distance is too large even when the setting is Short.

 

Do change the LKA sensitivity from (default) Standard to High. It will now oscillate less because it reacts
sooner when approaching side lines. Tap the four (4) arrow square button on the right steering wheel spoke
to the right to display the depiction of what the camera can "see". Also shows the Dynamic Speed Control
choices 3,2,1 bar. LKA is pretty sensitive to things such as lane width: '8 and things that obscure such as snow.

 

There is a stop and go feature, that I find works very well

 

also, if I chose to drive from coast to coast, the Tesla autopilot wouldn't know where to refuel, I would probably be high and dry in the Midwest somewhere.

 

There is a stop and go feature in the RX?
I was not aware of that. Can you please let us know how to activate it?
Thank You.

 

The car will come to a complete stop, without activating pre-collision system, from your set speed. To resume, you will need to either step on the gas or tap up on the cruise control stalk. You can basically do one-pedal driving. At speeds below 15 mph, I find that you can use LKA without keeping your hands on the wheel; just have to make sure your car still detects the lines (outer sides of the lines on display are highlighted).

 

Great suggestion, I am going to try this later on. Thank you!

 

So the RX has to have the Radar Cruise on in order to activate the stop and go feature. I will definitely give it a try next time.
I recently discovered about the Steering Steer using the Radar Cruise and it was just awesome.
Thank You.

 

Picked up up my 2017 RX 350 yesterday. Took it on a drive from NW SUBURBS OF Chicago to Milwaukee. Decided to try the cruise control. I was doing 65 and set the cruise. Apparently I was just at 3 car lengths from the car in front of me. I tried to move closer by lifting the cruise arm up to accelerate and nothing happened. I took my finger off the cruise arm. I then moved over a lane where there was no cars. The car started accelerating sharply by itself and was continuing to accelerate past 85 by itself when I finally it the brake. Is it possible the car remembered my attempt to accelerate with a car in front of me and then when there was no cars it implemented my acceleration request even after I had taken my finger off the cruise arm?

 

 

When you move the arm upwards and hold it there it will increase the set cruise speed in 5 kph increments (not sure about mph), so you initially set it at 65, held the arm up and it would have increased the set speed to 70, 75, 80, 85, 90, etc. Tapping the arm quickly increases the speed 1 kph at a time. When you were behind the other car by lifting the arm the car will not accelerate until the car in front moves out of the lane or further away. When you changed lanes there was no other car hence the system started accelerating up to whatever that set speed you did a little earlier. When the distance from the car in front is set to 3 notches it's quite a large distance, it's in the book but without looking may be 300 metres or so. I usually set mine to 2 on the freeway. When the cruise is set and you want to get closer to the vehicle in front you can use the accelerator but when you release it the car will slowly move back to it's correct position.

Hope that all makes sense.

 

Like Rarebird, I too have used the dynamic cruise control quite a bit since picking up my new RX350 (just earlier this week

That said, I always select the "Driving Assist System Information" on the multi-information display. You'll find this on the instrument cluster as an icon with a car driving within two lanes (see below image). This will confirm that the cameras see definitive lane markings (indicated as two solid lanes) and also the speed the cruise control is set. This is helpful for two reasons. Sometimes the lane markings may not be detected (e.g. faded, dirty, weather, etc.). More helpful, it reminds me what speed the cruise is set, as the speed will adjust based on the selected car lengths (I always reduce to 1, which I think is still too much for Texas drivers). If I look down and the car is driving 65mph, I can glance down and see that the cruise is set at 70 and recognize that she has slowed down to keep distance.