Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
Register
  • We just completed a significant update, but we still have some fixes and adjustments to make. Please see this thread for more details and to find out how to revert to the old design. Cheers!

Cruise Control

Howdy,
New Tesla Owner and took the Model 3 LR for a long trip for the first time. The Auto-steer did not seem to like the two lane road back roads of Colorado, functions fine on the interstate highway but from my location it is better to go back roads to ski slopes. Due to the problems, I just switched to cruise control. The problem is that the back roads of Colorado seem to freak out the Cruise Control and I get random dramatic slow downs even when there is nothing in front of me or remotely near me. This is not once in a while but every few miles. What settings do I need to change the whole system to adaptive cruise control like a lot of newer cars. I plan to use the car during ski season and can't have the system slamming the brakes unpredictably when the road might have an icy patch in random areas or when I could have a car behind me trying to race up to the ski slopes.

I would appreciate advice on how to just switch it to simple adaptive cruise control when needed.

Thanks
 
Upvote 0

rt29781

Member
Apr 14, 2021
12
21
Aberdeen
TACC is not fit for purpose currently. We have a 2021 M3 with about 3000 miles on the clock. On minor roads the cruise control will experience many "phantom braking" events. Even on the UK's best motorways large vehicles changing lanes will cause the Tesla to brake for no reason. My advice is do not use TACC. Report the incidents to your safety regulator ( Report a Safety Problem | NHTSA ) and if possible record the incident on video by tapping the save icon. When the car starts to slow press the accelerator to cancel but this becomes very tedious over time so now I just drive the car and ignore cruise. If enough people complain eventually Tesla will react. In my case we almost ended up with a lorry hitting our car when the Tesla braked suddenly for no reason.
 
Last edited:

dirt_nap

New Member
Nov 18, 2021
2
6
Nevada
On 11/21/21, my family and I returned from a long road trip in my new 2021 Model Y Long Range. During that trip I have determined that cruise control is unusable on 2 lane highway travel. When there is oncoming traffic on a 2 lane highway, the car will suddenly dramatically slow down even after disabling ALL autopilot features and enabling only cruise control. The slowdown is almost certain to happen if a large semi truck is coming in the opposite direction, but will periodically happen when changing from light to shaded road, climbing and cresting a rise in the road or when negotiating right-hand curves where cars are heading in the opposite direction. It is shocking when it happens and is entirely unsafe especially when someone is following behind me. Basically, cruise control in my Model Y in its current state is unusable and dangerous. During our trip I literally had to drive hundreds of miles with no cruise control until we hit the large freeways of southern California and even then, the car would suddenly slow down when passing a semi truck that was clearly in its own lane. I need a basic cruise until autopilot is ironed out.
 
Apr 13, 2021
333
448
Colorado
Howdy,
New Tesla Owner and took the Model 3 LR for a long trip for the first time. The Auto-steer did not seem to like the two lane road back roads of Colorado, functions fine on the interstate highway but from my location it is better to go back roads to ski slopes. Due to the problems, I just switched to cruise control. The problem is that the back roads of Colorado seem to freak out the Cruise Control and I get random dramatic slow downs even when there is nothing in front of me or remotely near me. This is not once in a while but every few miles. What settings do I need to change the whole system to adaptive cruise control like a lot of newer cars. I plan to use the car during ski season and can't have the system slamming the brakes unpredictably when the road might have an icy patch in random areas or when I could have a car behind me trying to race up to the ski slopes.

I would appreciate advice on how to just switch it to simple adaptive cruise control when needed.

Thanks

I live in CO and drive all over the 2-lanes in the Rockies as well with a Vision-Only Model Y. I do notice phantom slowdowns and braking - primarily for me is at the top of hills it will phantom slow down, right after hills it may have a phantom slowdown, and phantom hard braking whenever a car in the opposite direction crests the top of an oncoming hill at the edge of the vehicle detection range of the vision system ~250m.

My recommendation - hover your foot over the accelerator, or try and learn what your specific vehicle has the phantom slowdowns/hard braking for. Some small percentage of phantom events (I would guess 5% or less) are truly random - however, the rest are repeatable situations that you can take your foot off the carpet and hover over the accelerator in the event you need to respond to an incoming event.

Not fun to have to learn with a family in the vehicle, but it can be somewhat manageable at least. On these two lanes also, I usually set my speed to exactly the speed limit rather than 5 over - this lets me "stomp" on the accelerator a little in advance of when I predict a phantom event may be about to occur - a little bit of acceleration is definitely preferable to random braking. Going the speed limit sure does piss off every other driver on the road - why do people insist on driving so dang unsafely fast on these tricky mountain roads?

If it is a major problem for you, I agree with the British person above - report it to the NHTSA for sure.

Tesla has a huge, huge focus on city streets/FSD Beta right now. The Phantom Braking problem has gotten worse over the past year, particularly in Vision-Only vehicles. This is very funny to me because everyone just over 6 months ago (before Vision-Only came around for the Model 3 and Y) was clamoring over each other to say that the radar was the primary cause of phantom braking. In reality, the true problem with phantom braking is that Tesla is not providing the issue with the focus it needs - it is 100% fixable but they are dead-focused on city streets driving right now and 100% the project managers running the FSD program know about highway phantom braking and exactly what it would take to fix it - they're just not doing it.

From a wider perspective and as an owner very invested into the FSD program ($10k paid!) I am super nervous about this behavior from the Tesla management team. If they keep cowboying this stuff, regulators can and will take over the program development and we all lose out on our FSD as governments worldwide force FSD programs to be developed internally. We could even see Autosteer and even TACC taken away by regulation. Personally, I'm OK with this - there is some level of cowboy-ism that is definitely unsafe and very bad for consumers - but on the other hand, I really want FSD Beta and really still like Autosteer in its current iteration.

JEEZ, that went on. Anyway just try and learn where phantom braking is most likely to occur - get your foot on the pedal and counteract it proactively. I truly believe only 5% of phantom events are "random" and the rest are predictable.
 
Last edited:
  • Like
Reactions: SpaceShipDrvr
Yep, had a 5hr drive today, and cruise control is close to unusable on an undivided highway. If you see a truck coming towards you, you can be 80% sure the car will slam on the brakes. So frustrating.

Please, Tesla, if you aren’t going to fix it, add a setting in the menu that can turn it into a “dumb cruise control”. Because this is the first car I’ve own with traffic-aware or adaptive cruise control, and now it feels like a downgrade from plain dumb cruise control.
 
  • Love
Reactions: sckor and Saxgod

Saxgod

Thread Necromancer
May 3, 2019
250
151
Texas
Yep, had a 5hr drive today, and cruise control is close to unusable on an undivided highway. If you see a truck coming towards you, you can be 80% sure the car will slam on the brakes. So frustrating.

Please, Tesla, if you aren’t going to fix it, add a setting in the menu that can turn it into a “dumb cruise control”. Because this is the first car I’ve own with traffic-aware or adaptive cruise control, and now it feels like a downgrade from plain dumb cruise control.
Totally agree. We were just discussing the need for a dumb cruise control option since they can’t seem to get their stuff together.
 
  • Like
Reactions: SpaceShipDrvr

Products we're discussing on TMC...

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


SUPPORT TMC
Top