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Stopping at Green Lights [on FSD]

Mar 20, 2021
9
13
94549
I have seen videos of Teslas that while on cruise control and Autosteer will automatically proceed through green lights without driver input. I have a Model 3 FSD. My car will always try to stop at any traffic light. Red Yellow or Green, unless I depress the right side stalk or touch the accelerator. However, if there is a car in front of me that goes through a green light, the Tesla requires no input tp proceed.

Is this a setting? Is there something that can be done to make it continue through green lights?
Thanks,
A
 

AlanSubie4Life

Efficiency Obsessed Member
Oct 22, 2018
10,917
13,672
San Diego
I have seen videos of Teslas that while on cruise control and Autosteer will automatically proceed through green lights without driver input.

However, if there is a car in front of me that goes through a green light, the Tesla requires no input tp proceed.

No, there are no other settings. Your car is working as designed. Without a lead car, when it warns that it is going to slow/stop for traffic control, you must use the accelerator or press down the drive stalk to proceed.

This has the potential to change at any time though, so be sure to keep checking those release notes and the manual.

Screen Shot 2021-06-10 at 9.07.10 AM.png
 
Last edited:
Mar 20, 2021
9
13
94549
Thanks. The video I saw was from Jay Leno's Garage in which he drove a Model Y Performance on city streets. It was from about a year ago. He remarked that it saw the green light and proceeded through. He didn't say anything about making any input.
 

techlogik

Closed
Mar 22, 2021
380
271
FL
No, there are no other settings. Your car is working as designed. Without a lead car, when it warns that it is going to slow/stop for traffic control, you must use the accelerator or press down the drive stalk to proceed.

This has the potential to change at any time though, so be sure to keep checking those release notes and the manual.

View attachment 671659
Thanks for this explanation and notes. When I did a test drive in a performance model the other week I wondered why it would slow or bing when nobody was in front of me and cars next and I had to keep hitting the down stalk. Thought it was a disengage but this is normal and confirmation to keep going through the green light with nobody in front. Guess it wasn’t a flaw but designed.
 

cjxmtn

Member
May 22, 2021
165
199
SoCal
No, there are no other settings. Your car is working as designed. Without a lead car, when it warns that it is going to slow/stop for traffic control, you must use the accelerator or press down the drive stalk to proceed.

This has the potential to change at any time though, so be sure to keep checking those release notes and the manual.

View attachment 671659
Mine yesterday came up to a green light and had a red line across the bottom. It interpreted the green light wrong and even with a follow car it tried to stop. Definitely was weird. I wanted to snatch a picture but couldn't get my phone out in time.
 

dgatwood

Member
Dec 20, 2017
959
1,103
Sunnyvale, ca
Mine yesterday came up to a green light and had a red line across the bottom. It interpreted the green light wrong and even with a follow car it tried to stop. Definitely was weird. I wanted to snatch a picture but couldn't get my phone out in time.

You sure it got the light wrong? I think the line color defines its planned behavior (i.e. whether the car is going to stop or is stopped), and the color of the light icon on the screen tells what color it thinks the light is. So if it was ignoring the lead car for some reason, that's not unexpected.
 

cjxmtn

Member
May 22, 2021
165
199
SoCal
You sure it got the light wrong? I think the line color defines its planned behavior (i.e. whether the car is going to stop or is stopped), and the color of the light icon on the screen tells what color it thinks the light is. So if it was ignoring the lead car for some reason, that's not unexpected.
maybe, I guess that makes sense, but every other light along the path was green with a green bar under it, except that one which was green with a red line under it. Following the same car down the street. Either way, it wasn't doing what it was supposed to be doing.
 

dgatwood

Member
Dec 20, 2017
959
1,103
Sunnyvale, ca
maybe, I guess that makes sense, but every other light along the path was green with a green bar under it, except that one which was green with a red line under it. Following the same car down the street. Either way, it wasn't doing what it was supposed to be doing.
Yeah, I checked yesterday to confirm, and without a car in front of me, mine shows a red bar with green lights until I confirm with the accelerator. I'm not sure why it would ignore the car in front of you unless maybe you got too far away.
 
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ATPMSD

Member
Mar 12, 2021
350
360
Atlanta, GA
Model 3 owners manual page 120:

Traffic Light and Stop Sign Control (Beta) (if equipped): You can enable the ability for Model 3 to automatically stop at traffic lights and stop signs (see Traffic)

In my Model S with this turned off the car no longer slows at green lights.
 
Last edited:

digitaldart

Member
Jun 26, 2021
6
3
Orange, VA
Not sure if this will prove of any value, but just in case it does...

Since taking delivery of the car, have been attempting to gain insights into autopilot driving. After reading through the descriptions here, I am inclined to think that the car's response is simply not consistent. Being a tech geek, I want to believe that it is black and white, but after my own experiences, I do not believe that it is so.

Have had both situations of following a car through an intersection with a green light, and light turning red. Have experienced both situations without following another car as well.

My synopsis is that sometimes the recognition of the green light is indeed interpreted as it should be, and sometimes that it is not. My focus now is to expect that it may not react correctly and just to be prepared.

Most green lights work perfectly whether there are cars in front of me or not, but occasionally, the car decides that it must stop and that's how it is. But, more often than not, it works just as it should.

The oddest occurrence that I have experienced is where I was proceeding through a green light, no car in front of me, and suddenly the car swerved as if to avoid a sudden obstacle. There was no obstacle, and all I could figure was that maybe a bird flew in front of the car?! Since I saw absolutely nothing that would make it swerve, I found it very odd. However, it did continue through the green light without prompt or interruption.
 

dckiwi

Member
Aug 12, 2016
468
882
Reston, VA
To clear up any confusion - the red (or green) line on the road in the display is an indication of what the car intends to do. It is NOT an indication of whether it detects a green or red light. You can see what color it believes the light is by looking at the traffic light rendered on the display.

As has been stated in this thread, the car will *usually* decide to proceed through a green light without confirmation if there is a lead car. And it will *usually* decide to stop at a green light without confirmation if there is no lead car. However, what it considers a 'lead car' can be difficult to predict, so I always look at the line to see what it intends to do.
 

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