billarnett
Member
Are the two not linked? Would seem logical.
Perhaps. We will probably never know the details of the algorithms. But it is clear that the two at least have different thresholds.
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Are the two not linked? Would seem logical.
After 3 cars cut me off yesterday while using TACC, I realize its a system that is not completely trustworthy.
If a car cuts you off and is not completely 100% in your lane (halfway cutting into your lane) the car will not sound the Collision Avoidance system or emergency braking. Ask me how I know, as I had to slam on my brakes 2 out of 3 times I was cut off in slow stop and go 10MPH-25MPH traffic. If I didn't intervene the car was going right into the back of them.. I came within inches.. even the parking sensors showed STOP lol
Something needs to be fine tuned for when cars are entering in your lane and getting too close.. it only wants to react when the car is completely inside the lane and has no care about cars halfway in the lane or straddling the lines of the lane.
I've had this occur as well.
Depends on what you expect from "autopilot" based on the name I'd compare it to an aircraft, and I can guarantee that aircraft would not auto-brake for another plane in their flight path at all... So we're already ahead of that, what we're missing is holding the steering wheel for you.It should be renamed to Semi-Autopilot instead of Autopilot
Did you happen to note the make/model of the car in front of you? If he locked his brakes then it's not so surprising that you were able to stop so far behind him with your ABS. What I'm reacting to is the discrepancy between "inevitable collision" and your experience. It sure would be nice to see the vehicle logs...
TACC seems to work quite well for me. I use it all the time. I am not expecting miracles around corners, etc. But what I do find lacking is the lane keep assist. It is amazingly inaccurate. It vibrates all the time when I am clearly in the center of the lane and often does not warn when I purposely test it to see if it will. I keep thinking about turning it off but what if... I certainly do not want active lane keep with the current implementation. I'm not sure, but I think it picks up the cracks in the road as lines. It needs refining, for sure.
- The ultrasonic sensors are far too slow to detect the blindspot appropriately. Currently, I'm not sure that the refresh rate is high enough to properly account for all risks.
My lane departure warnings are perfect. They always go off only when they should--so it's not a system-wide problem. You might want to have the service center take a look at
Regarding the relationship (or not) between TACC and emergency braking... In addition to turning off TACC (but not just the "TA" part), you can also turn off emergency braking. It's in the settings. Feel free to test them independently to figure out what systems are doing what.
The top 3 most dangerous scenarios where TACC is failing for me are:
(1) Lane intrusions: When a new car merges into the lane, even though the human (me) sees the indicator lights flashing, the pre-posturing, the shoulder check of the driver, and the eventual move of the vehicle into my lane, TACC does not notice any of this. It only notices when the intruding car is basically fully in my lane, then it abruptly slows down (or hard brake with collision beeps).
- When a car leaves my lane, do not immediately accelerate to reach the speed. Hang out for 2-3 seconds before doing so, because traffic conditions often change quickly in this case.
Regarding the relationship (or not) between TACC and emergency braking... In addition to turning off TACC (but not just the "TA" part), you can also turn off emergency braking. It's in the settings. Feel free to test them independently to figure out what systems are doing what.