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It's good that we're given the option of turning off systems which annoy us or we find intrusive. I was not sure about the Adaptive Cruise Control and the Lane Tracing Assist, but I've gotten used to them and use them regularly. I agree though that some people are too reliant on the automated systems but I appreciate having them as a backup just in case there is some situation that catches me off guard. To put it another way, with the kinds of clueless drivers around now, it's comforting to think that their cars might protect them from doing something negligent.
 
Humans make mistakes. Someday when you fail to pay attention for a split second it may save a life and keep you out of jail. It's too bad you turn it off.
Your comment proves my point. Failing to pay attention and being dependent on technology. I have been driving commercially for a long time and have zero avoidable accidents in the last 27 years. A lot of accidents are avoidable even though you may not be at fault. More often then not I find myself driving for everybody else. People more often then not will do what they are not supposed to do when it comes to their driving habits. Another reason why I have front and rear facing dash cameras. I have tons of stories about inattentive drivers and their poor driving habits.
 
It is your job to control your car and brake appropriately. Never test the systems as you might have an accident. They are not designed to avoid accidents but lessen the severity of one. Mine has never braked for me but I did see the warning to brake.
They are indeed designed to both avoid crashes entirely and also to reduce the severity in cases where it is not possible to stop completely before an impact.


If you have teen drivers like I do, the benefits are significant:


Rear autobrake systems are also now proving to have real world crash avoidance benefits, though these are mainly fender benders.

 
Your comment proves my point. Failing to pay attention and being dependent on technology. I have been driving commercially for a long time and have zero avoidable accidents in the last 27 years. A lot of accidents are avoidable even though you may not be at fault. More often then not I find myself driving for everybody else. People more often then not will do what they are not supposed to do when it comes to their driving habits. Another reason why I have front and rear facing dash cameras. I have tons of stories about inattentive drivers and their poor driving habits.
Boy me too. When I resumed motorcycling after a 28y hiatus I really worked on developing 'active riding' skills roughly translated to mean managing risk dynamically thru focused situational awareness and smart riding skills. It translated well to car driving so I became a much better driver as well.
 
Boy me too. When I resumed motorcycling after a 28y hiatus I really worked on developing 'active riding' skills roughly translated to mean managing risk dynamically thru focused situational awareness and smart riding skills. It translated well to car driving so I became a much better driver as well.
...which, unfortunately does affect to the skills of so many others on the road. It's not you I'm concerned about, it's what those others might do.
 
...which, unfortunately does affect to the skills of so many others on the road. It's not you I'm concerned about, it's what those others might do.
Or when the tech fails. My Honda Sensing went haywire a couple of times. The worst was a 2 lane road, oncoming large truck in his lane (no issue). I was approaching one of those big metal plates on the road covering a hole. I think what happened is the computer got a radar reflection of the truck off of the plate, and SLAMMED on the breaks so hard it threw everything off of the seats into the floorboards. Full stop. If someone was behind me I would have been rear ended.
 
Or when the tech fails. My Honda Sensing went haywire a couple of times. The worst was a 2 lane road, oncoming large truck in his lane (no issue). I was approaching one of those big metal plates on the road covering a hole. I think what happened is the computer got a radar reflection of the truck off of the plate, and SLAMMED on the breaks so hard it threw everything off of the seats into the floorboards. Full stop. If someone was behind me I would have been rear ended.
Good thing I drive a Toyota.
 
Welp, I can tell you that today our R4P's pre-collision system likely saved us from a nasty accident. A car pulled out from an intersection trying to make it through the gap between me and the car in front. We were going about 45 mph, which wasn't nearly enough time for the other car to make it through. I hit the brakes pretty hard, but the PCS hit them even harder. We skidded to a stop perhaps 8 feet from the crossing car. So yeah, I think it works.

(On a side note, I'd been following this thread because I was curious about others' experience with this system. I drove a Honda Accord for a few weeks, and it was constantly flashing BRAKE on the dash, and I'm a pretty careful driver. Perhaps it's overly sensitive for city driving. The RAV4 has only pinged me once since I've had it.)
 
My last car was a 2019 Honda Insight hybrid with all the same safety systems as the R4P, except they worked a lot better. Lane keeping was fine, not annoying like on the R4P. My real concern however is collision avoidance. I know the radar system works because adaptive cruise control works okay. However, I have tried repeatedly in the 4 months of ownership to trigger the emergency braking or at least beeping if approaching a stopped car too fast, and have only been able to get one beep and no brake to happen. My Honda was much more sensitive. I have tried various adjustments on the R4P without luck.

Has anyone had a better experience with this?
You can’t truly test it unless you’re willing to hit something if it doesn’t work. The fact that you were able to manually stop before hitting anything means that the car was correct in its decision to not intervene.

I really don’t understand why so many people feel the need to test emergency features like this. Do you test your airbags too or just trust that they’ll work when needed?
 
Here is how Insurance Institute for Highway Safety tests the feature;
And here is Toyota’s description of the feature;
I thought it was time for some material for the visual learners.
 
I don't have an R4P (and based on the many dicussion here, I probably never will), but it is my opinion that if you are relying on all the beeping and braking to avoid a collision, you are doing it all WRONG.

Your best accident avoidance 'device' is the pair of eyeballs that are part of the nut that holds the steering wheel.

I do have many of those devices in my Sienna. Apparently they are all doing their job, as I have not yet had a collision. I have had my van almost a year now, and am still getting used to the various noises. My goal is to never hear them, but also to be acquainted with them so I recognize them when I hear them and know why they are sounding.

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Indeed but as a back up for that time when the human brain and mk1 eyeball fails is a good insurance policy. Or that time when the machine can simply react faster than any human can.

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Welp, I can tell you that today our R4P's pre-collision system likely saved us from a nasty accident. A car pulled out from an intersection trying to make it through the gap between me and the car in front. We were going about 45 mph, which wasn't nearly enough time for the other car to make it through. I hit the brakes pretty hard, but the PCS hit them even harder. We skidded to a stop perhaps 8 feet from the crossing car. So yeah, I think it works.

(On a side note, I'd been following this thread because I was curious about others' experience with this system. I drove a Honda Accord for a few weeks, and it was constantly flashing BRAKE on the dash, and I'm a pretty careful driver. Perhaps it's overly sensitive for city driving. The RAV4 has only pinged me once since I've had it.)
I am not sure what skidding means. You should have antilock brakes so you should not be skidding. I am glad everyone was ok.
 
Honestly, the Toyota system is FANTASTIC. Zero complaints about PCS from me.

I'm really risk averse, so I leave my PCS on the most sensitive setting. Even there, it really is not apt to go off very often. Only on that setting does it once in a great, great while pick up on a turning car and flash the warning--but I've never had it hit the brakes inappropriately (or, honestly, at all...)

I've really only needed the system to save me once in my 2019 Rav, and save me it did.... snapped me back to attention to make an evasive maneuver to avoid a collision. That's all the proof I needed to keep it turned on. Humans screw up from time to time, occasionally...
 
I have about 700 miles on my R4P and while I haven’t had any of the systems intervene yet I’m glad to have them at work in the background, except for the lane keep assist. The Toyota safety suite is similar to what I had on my last three Subarus. Over my previous ownership of them the AEB reacted a few times when other drivers darted across my path, faster than I could brake myself. On the other hand, whenever I deployed (and currently deploy) the LKA it is an annoyance with little merit IMO, because if it is doing any frequent correcting you shouldn’t be driving. And, it’s NOT autonomous driving, although some people seemingly play with it as if it was. Activating the LKA when one is too fatigued to safely drive and thinking you can keep driving is a serious mistake.
At least that’s my assessment.
 
My anecdotal experience (3 months with the Rav4).

When I would drive my kids' 2017 Subaru Legacy, the collision avoidance would beep more frequently and I'm NOT getting that in the Rav4.
Once when backing out of the garage, the recycling bin was slightly off-center and closer to my Rav and the Rav stopped automatically. I was shocked and thought what the heck.

So, it seems like it is sensitive (the backing out incident) but not so sensitive when driving (since it hasn't beeped yet). Of course, it could be my driving habit is different in a 5 year old sporty car versus a 3 month old SUV. Interesting to see if the collision avoidance in the Rav beeps more at me in a few years (when it's not so new so I'm "less careful") :)
 
I don't have an R4P (and based on the many dicussion here, I probably never will), but it is my opinion that if you are relying on all the beeping and braking to avoid a collision, you are doing it all WRONG.

Your best accident avoidance 'device' is the pair of eyeballs that are part of the nut that holds the steering wheel.

I do have many of those devices in my Sienna. Apparently they are all doing their job, as I have not yet had a collision. I have had my van almost a year now, and am still getting used to the various noises. My goal is to never hear them, but also to be acquainted with them so I recognize them when I hear them and know why they are sounding.

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A family member totaled our `14 camry into a building by mistaking the gas pedal for the brake.. This is one reason we're interested in pre collision on the new vehicle. It may not prevent a similar crash but it's an improvement.
 
All this safety is great especially for older drivers though full autonomy would be even better. Perhaps in a decade they work out all the bugs out.
 
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