-
Want to remove ads? Register an account and login to see fewer ads, and become a Supporting Member to remove almost all ads.
Things my wife said about Navigate on Autopilot tonight
- Thread starter AlanSubie4Life
- Start date
My experience with jerkiness is especially noticeable when passing a vehicle with auto lane change or NoAP enabled. The vehicle speeds up quickly, then notices the vehicle in front of me still exists and slows quickly, continues moving to the other lane and then accelerates quickly again. Follow distance and chill mode make zero difference to this behavior.
In general driving, when following a car with TACC, EAP, or NoAP enabled, the car feels like a dog that's excited to be let off its leash. You can feel it accelerating for a fraction of a second, then just following the leader. Over and over again. That feeling is unsettling to say the least, but also makes passengers worry that the car is going to misbehave and just accelerate into the car in front of us.
The consequence of all of this is that the more people that experience these issues, the more people that believe autonomy on any level isn't ready for general use.
This does nothing.
In general driving, when following a car with TACC, EAP, or NoAP enabled, the car feels like a dog that's excited to be let off its leash. You can feel it accelerating for a fraction of a second, then just following the leader. Over and over again. That feeling is unsettling to say the least, but also makes passengers worry that the car is going to misbehave and just accelerate into the car in front of us.
The consequence of all of this is that the more people that experience these issues, the more people that believe autonomy on any level isn't ready for general use.
This does nothing.
What I know for certain, is that AP set anywhere from 1-3 (which is typical follow time for So Cal freeways) absolutely does not work satisfactorily. So, I'm willing to try something different.
changing following distance ain't gonna help. I have mine set on 7, and that means there is plenty of space in stop-and-go traffic: just as my car starts to accelerate, another car will move over in front of me, so my car immediately goes into regen to get back to 7, at which time it re-accelerates....just like a roller coaster
LOL Did you try raising your follow distance? That soothes out some of the slowing/acceleration.
If 7 does not work acceptably, then why do you have it set at 7? What other setting have you tried?
Just so you know, the numbers aren't seconds. When set to 7, your car will occupy the space in front of you in 3.5 seconds. I keep mine at 6 (3 seconds) and MAYBE 5-6 cars cut in front in LA traffic. So, I get home 45 seconds later... so what? I think this is so overblown but I could be wrong. One of these days we need to test the theory and see what the actual difference is vs less stress
I just retired, so I rarely drive in rush hour anymore, so the setting doesn't matter to me.
The problem we (and others in this thread) experience with cars cutting in front is the abrupt braking from the Model 3, then delayed acceleration to regain the set speed. It's not smooth at all. It only takes a few of these cut-offs to make me turn off NOA and drive myself.Just so you know, the numbers aren't seconds. When set to 7, your car will occupy the space in front of you in 3.5 seconds. I keep mine at 6 (3 seconds) and MAYBE 5-6 cars cut in front in LA traffic. So, I get home 45 seconds later... so what? I think this is so overblown but I could be wrong. One of these days we need to test the theory and see what the actual difference is vs less stress
So, I'm trying to find the setting that provides the least braking and acceleration. If that means a longer follow time so cars can move in front of us without the M3 braking, then maybe that's best (for us).
Last edited:
The Tesla manual states the following on page 72:
"Adjust the Following Distance
To adjust the following distance you want to maintain between Model 3 and a vehicle traveling ahead of you, press the steering wheel's right scroll button to the left or right to choose a setting from 1 (the closest following distance) to 7 (the longest following distance). Each setting corresponds to a time- based distance that represents how long it takes for Model 3, from its current location, to reach the location of the rear bumper of the vehicle ahead of you."
I read this statement to mean a setting of 1 means it takes one second from the Tesla's current location to reach the location of the rear bumper of the car in front. A setting of 7 would mean it takes seven seconds to reach the location of the rear bumper of the car in front.
Am I interpreting the Tesla manual too literally?
Last edited:
Daniel in SD
(supervised)
I want a 1-7 mode with an average of 3.5. I don’t want to feel like I’m being driven by the driver in front of me who modulates their speed by switching rapidly between the accelerator and the brake.
Yes you are. That is worded in a way that is misleading. it SHOULD say "Each setting corresponds to a time- based distance of approximately .5 seconds that represents how long it takes for Model 3, from its current location, to reach the location of the rear bumper of the vehicle ahead of you." But then they couldn't change it
7 = 3.5 seconds. each number is roughly .5 seconds. Feel free to time it yourself one day. 7 seconds would be a lifetime on the freeway
Daniel in SD
(supervised)
No, because I want it to vary the following distance to minimize the "jerk" (rate of change of accelerator input). Right now it feels like whoever is in front of me is driving my car and a surprisingly large number of people are incapable of driving smoothly.
https://www.tesla.com/sites/default/files/model_3_owners_manual_north_america_en.pdf
I find 2 keeps me from having cars cut in constantly when in traffic, while not making me uneasy about how quickly traffic stops before my car decides to react. If I used 3 I'd end up driving backwards trying to avoid cut-ins.
I haven’t found following distance/time to make much difference.
As mentioned above, I use following time 6. As also mentioned, what we really want is a variable following time around that set point, where vehicle velocity is kept reasonably constant.
Unfortunately this is not what happens currently. There is apparently no rubber-banding, nor filtering (integration) of the commanded acceleration. And if there is actually any filtering, it is somehow insufficient.
Notably, this issue also seems to apply to commanded speed changes irrespective of whether you are following someone. Adjust that set speed too quickly, and it will jerk you. When it comes down to it, minimization of jerk (which is what my wife was complaining about, da/dt) has not been sufficiently addressed with TACC.
Last edited:
Yea I totally get that. At 6 it's keeping the distance of 3 seconds behind the car in front of you so if they are under your set speed limit, they control your car. It's the drawback of TACC.
Yes, but a completely solvable one! The only question is when/if they will get around to fixing it. There was a claim earlier that this is dealt with by the neural net, but I am not so sure about that.
Similar threads
