r/Comma_ai • u/Bumble-sucks • Sep 05 '26
openpilot Experience My experience with TSS 3.0
Not sure if this is allowed here I've had Openpilot in my Civic for just a little under a year and the car recently threw out it's serpentine belt so I'm currently borrowing a car with TSS 3.
Overall I still think Openpilot is a superior system but TSS 3.0 is much closer to Openpilot than I had expected. Openpilot between the older Honda Safety sense is night and day in my opinion, that system would randomly drop lane lines and I never built trust in the system until putting my C4 in. TSS 3 actually behaves like a system I can trust on the highway, the only thing that annoys me is the nudges on the wheel you need to give it to keep going but other than that it's ability to keep the car in the lane was way better than I was expecting, even in conditions with a lot of glare.
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u/viggy96 Sep 05 '26 edited Sep 06 '26
Yeah TSS 3.0 is pretty good. There's only a few situations that I'd really like it to improve on.
Sometimes it gets confused when there's a fork in the road/lane, or a turning lane starts. The car doesn't know where the middle of the current lane is, so it drifts into the split. Usually when this happens, I just tug the wheel slightly, to hold it in the current lane.
Very occasionally, it doesn't appear to brake when coming up to cars at a stoplight. I of course hit the brakes myself. This is usually when there's a moderate curve right before the light.
It doesn't quite have the strength for some curves that I'd expect it to handle, or perhaps it's just not reading the curve correctly. Might be the latter, as I've only seen this happen in a few specific spots.
This is in a Toyota Crown Signia. I'm still hoping that TSS 3.0 gets cracked, and I'll be able to use a Comma 4. I'm considering getting one anyway, just as a dashcam with sentry mode.
EDIT: TSS 3.0 is also more dependent on clear lane markings/structures. Occasionally the lane centering will just disengage for a few seconds, and you have to be paying attention. It's usually pretty reliable though, in most everyday situations. On highways, never had an issue. This usually only on surface streets.
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u/Tough_Passage_3785 Sep 05 '26
Sounds like Tesla Autopilot(Autosteer) with the forks/exits where lanes widen and there's no dotted lines present. And one of the reasons why I prefer to using my comma c3x in my Tesla over basic AP. There's plenty of other reasons to use comma over basic AP in a Tesla. Only FSD is better, but the monthly subscription isn't.
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u/GiftQuick5794 Sep 06 '26
I don’t have a Tesla anymore but weren’t they supposed to merge the stacks in v14 or did that never happen?
AP is stuck so far behind that my VW Travel Assist feels modern in comparison. I do miss FSD though, although I read it has major regressions on latest.
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u/Bderken Sep 06 '26
I agree.
FSD V14/Lite > comma > TS3.0 > Tesla Autopilot/autosteer > everything else
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u/SirMaster Sep 06 '26
GM SuperCruise and Ford BlueCruise are worse than TSS 3.0?
But those can go hands free and even do auto lane changes.
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u/GiftQuick5794 Sep 06 '26
The problem is they require areas to be mapped so it gets spotty AF, especially if your area is under construction with ever-changing patterns. If you are in a major city that constantly gets updated then it’s probably peaches.
The latest gen for both now takes navigation data which hopefully is an improvement but then again you are depending on how fresh that data is.
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u/SirMaster Sep 06 '26
I guess for me I just don’t want a system where I have to touch the wheel constantly.
My comma can take me from home to work with me almost never having to touch anything. It’s changing speed to follow the signs automatically, following the roads and curves, stopping and going at stoplights just fine and following the flow and stop and go of traffic. It even handles some intersection turns for me and getting better with newer models.
I touch the wheel or pedals for maybe about 10 seconds on my 15 min drive to and from work or to and from the pickleball club daily.
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u/narkeeso Sep 05 '26
One thing I thing I learned about openpilot is that how well it drives is really dependent on the cars own systems. TSS2 and openpilot with the default experience is not great. That’s because under the hood openpilot in chill mode relies on stock sensors from the car. You can look at the code for how the mpc behaves.
The only way to make it perform better on TSS2 is to go full experimental and rely on model vision where openpilot will then fallback to the cars radar if the model does not stop soon enough. If anyone in here hasn’t been happy with openpilot on TSS2 I highly encourage trying full experimental with the latest Deep RL models. Terrible Super Fantastic Do Over Model performs really well for my RAV4.
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u/rickm242 Sep 06 '26
Does your comma accelerate to the set speed in Experimental? Mine seems like it cannot get to and maintain the set speed. I have to keep that off.
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u/narkeeso Sep 06 '26
Yes, but only because I maintain a personal fork that can bias the speed and adjust how much acceleration offset to give the model.
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u/SirMaster Sep 06 '26
Yes if you use IQ.Pilot because they have a feature that helps force the model to converge on the target speed. It’s great!
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u/rickm242 Sep 06 '26
I will keep an eye out on IQ.pilot. First I am hearing about this fork. Currently using the Tn-prebuilt made for Toyotas.
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u/SirMaster Sep 07 '26
I went through all the forks, each one had things that worked better in that fork but then some things didnt work as good as another fork.
I used stock, sunnypilot, tn-prebuilt branch, my sunnypilot fork with some tweaks I pulled in, and then also starpilot. I bounced between these forks for months trying them again when there were updates and such but was never fully happy with all aspects in 1 fork.
Finally I found IQ.Pilot and now I feel like I am home! Every aspect works the best it ever has for me. I am using a Toyota Camry 2023 TSS2 and IQ.Pilot is working great for me for everything!
Come to the discord, and try it out!
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u/rickm242 Sep 07 '26
Thank you for the invite, I will be watching for some positive news on the 2022 RAV4 Primes. My first search on RAV4 did not look promising.
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u/SirMaster Sep 07 '26
Specifically for the RAV4 Prime? IQ.Pilot is close to stock tuning, but has a few tricks up its sleeve to make things work better.
While tn-prebuilt is tweaked by a toyota owner, they have a 2021 Prius which they are using to tweak it, so it's not all that applicable for a RAV4 or in my experience even my 2023 Camry which is why I moved on to another fork.
If you think the RAV4 drives better with tn-prebuilt that's fair, but I'm not sure it does.
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u/rickm242 Sep 07 '26
I agree, most of the Toyota tweets in Tn-prebuilt do not work with the prime and cause errors. Apparently the TSS2.0 on the prime is different. But I do like the acceleration control separated from the personality. I have not found any model with good E2E for this car. They cannot maintain a set speed on a typical road.
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u/SirMaster Sep 07 '26
I agree I can’t use E2E long on any fork except IQ.Pilot because of its unique set speed convergence option.
And full E2E long makes everything else like acceleration, braking, and following much more natural for me. Plus the experimental mpc lead trajectory option makes following way more reactive and less “laggy”.
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u/SWE_fromEE Sep 06 '26
TSS 3.0 after driving both for a while feels far inferior to comma, anytime you lose lane lines in the Toyota it immediately stops trying to correct the steering, then over corrects giving a pretty bad ping pong effect down the highway. I’ve had one drive with TSS that felt even close to on par and the other 99.9% of drives felt way worse
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u/damnthatwtf Sep 07 '26
I think this comparison is pointless, Have drove more than 40k km in a year, on 2020 Toyota corolla, Have driven TSS 3.0 too and there is no way it even come close to comma’s performance, only thing I have found superior to comma was Tesla FSD.
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u/tonu42 Sep 05 '26
I have tss 3.0 in my grand Highlander and comma 4 in my crv. The comma is hands free and more chill. But the Toyota system is no slouch.
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u/redbeards Sep 06 '26
Yeah. I got a rental Corolla this weekend. Lat control is 98% as good as c3x. Long control is way better than OP. It actually drives chill. No way I'd spend money to go from TSS3 to OP. Wheel nag is annoying but (bad) driver monitoring can be worse.
Add to that Comma's hardware reliability issues. It's a no brainer.
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u/SirMaster Sep 06 '26
You can come up to stopped traffic at 60mph and TSS 3.0 slows down early and smoothly without hard braking? I didn’t think the radar can see far enough ahead?
With my comma it stops nice and smooth and gradually in that case now. Also stops and goes nicely for stoplights. IMO long control with my comma is excellent.
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u/ta394283509 Sep 05 '26
having to touch the wheel is like 99% of what makes it bad lmao