Radar cruise control-interestingly nice
Pole Position
Joined: Apr 2017
Posts: 301
Likes: 32
From: AL
For LKA, I set the sensitivity to high and it was OK in my recent road trip. It is far from perfect so you do need to correct it often. But it was designed as assistance only so it is very easy to correct it. You do not need to apply unusual force to pull the wheel back.
Lexus knows its limitation. If you do not apply any force to steering wheel, it will beep you. The RX is smart enough that when in a curve, it will warn you every second. But on a straight road, you have several seconds to stretch both your arms.
Sometimes you just have to trust the technology. My RX can be uncomfortably close to one side of the lane. But if there is no car near me, I just let it control the wheel. And once you know your car, you can actually tell when it needs your correction. Overall, on highway, I think ACC reduced 90% of my foot effort. And LKA reduced 50% of my hand effort. And as a bonus, the small corrections kept me from falling into sleep.
Lexus knows its limitation. If you do not apply any force to steering wheel, it will beep you. The RX is smart enough that when in a curve, it will warn you every second. But on a straight road, you have several seconds to stretch both your arms.
Sometimes you just have to trust the technology. My RX can be uncomfortably close to one side of the lane. But if there is no car near me, I just let it control the wheel. And once you know your car, you can actually tell when it needs your correction. Overall, on highway, I think ACC reduced 90% of my foot effort. And LKA reduced 50% of my hand effort. And as a bonus, the small corrections kept me from falling into sleep.
Lead Lap
Joined: Dec 2002
Posts: 759
Likes: 32
From: Nebraska
I doubt it did that, but same principle from 14 years ago. I still wouldn't trust my car to stop on it's own when I can guarantee it will on my own.
Racer
Joined: Sep 2012
Posts: 1,304
Likes: 177
From: WA
- Once when a large motorcycle moved in front of me, the cluster showed there was no car and would have mowed him down
- Again when behind a normal non-lifted pickup truck. Sensor was clean but system just did not detect the truck.
- Driving in a snowstorm, but this was because the snow eventually packed onto the sensor that it deactivated while driving. I probably should not have been using cruise control anyway but I was hoping the system could see through the snow better than me.
Driver School Candidate
Joined: Jul 2017
Posts: 34
Likes: 7
From: ON
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.
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.
Pole Position
Joined: Apr 2017
Posts: 301
Likes: 32
From: AL
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.
Last edited by guxu; Aug 4, 2017 at 11:58 AM.
Driver
Joined: May 2017
Posts: 146
Likes: 0
From: CA
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.
Driver
Joined: Mar 2009
Posts: 60
Likes: 6
From: WI
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.
Pole Position
Joined: Apr 2017
Posts: 301
Likes: 32
From: AL
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.
When a vehicle is detected running ahead of you, the system automatically decelerates your vehicle. When a greater reduction in vehicle speed is necessary, the system applies the brakes (the stop lights will come on at this time). The system will respond to changes in the speed of the vehicle ahead in order to maintain the vehicle-to-vehicle distance set by the driver. Approach warning warns you when the system cannot decelerate sufficiently to prevent your vehicle from closing in on the vehicle ahead. When the vehicle ahead of you stops, your vehicle will also stop (vehicle is stopped by system control). After the vehicle ahead starts off, pushing the cruise control lever up or depressing the accelerator pedal will resume follow-up cruising.
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Lead Lap
Joined: Nov 2013
Posts: 4,327
Likes: 1,236
From: IL
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.
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.
Driver School Candidate
Joined: Jan 2017
Posts: 17
Likes: 2
From: TX
Lexus Champion
Joined: Feb 2013
Posts: 2,954
Likes: 235
From: SoCal
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).
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.
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.
Pit Crew
Joined: Jul 2007
Posts: 159
Likes: 10
From: OK
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.
I recently discovered about the Steering Steer using the Radar Cruise and it was just awesome.
Thank You.
Last edited by jaymk; Aug 8, 2017 at 05:37 PM.