Chuck Cook tests Tesla FSD Beta v12.3 at challenging unprotected left turns (video)



Tesla’s latest FSD Beta release v12.3 is generally getting good feedback from beta testers except for a few hiccups here and there.

FSD Beta version 11 was struggling at unprotected left turn (UPL) scenarios. Although Tesla kept improving the algorithms, V11 did not improve significantly.

Tesla Model 3 owner and ex-US Navy pilot Chuck Cook tests FSD Beta on a complex UPL near his home in Jacksonville, Florida (JAX). This UPL gained fame in early FSD Beta builds and was even included in the software’s release notes.

Tesla stopped deploying new FSD Beta updates to Chuck Cook’s car after v11.4.9. In the meantime, Tesla’s employees were suspectedly spotted testing V12 on the same UPL in JAX multiple times. This was the training Tesla wanted to give to Autopilot AI before giving Chuck the final chance to test a customer car on this UPL.

– Advertisement –

Chuck received his FSD Beta v12.3 Autopilot update yesterday. Guess what he did first? Took his Tesla Model 3 to test on his complex UPL with varying degrees of traffic in multiple attempts.

The point to keep in mind here is that FSD V12 functions on end-to-end neural net artificial intelligence. Compared to its previous versions, Tesla had hard-coded various scenarios. FSD Beta 12 does not need manual code to run. According to Tesla’s Elon Musk, around 300K lines of code was removed from the backend and replaced with neural net decision-making using Tesla Vision AI.

In his latest video, Chuck took his challenging UPL more than 10 times. The first attempt was a good one. But in the 2nd attempt, instead of getting to the median faster, the car almost crept to the gap before taking the left turn.

In another attempt, Autopilot FSD Beta v12.3 took a bit risky left turn. At first, the car waited patiently at its creep limit but later it decided to move forward with traffic still coming from the left. The gap from the traffic was not large but according to Chuck, the car sensed that the oncoming pickup truck was slowing already. However, this was a goosebumps attempt at the UPL.

One other attempt particularly turned out to be dangerous where Chuck had to take over the vehicle’s control for safety (called a disengagement or intervention). This happened when the Tesla vehicle was halfway to the median but a pickup truck approached from the front fast and took a speedy left turn from a close distance. This confused Tesla Autopilot completely and the car paused in the middle of the road. Chuck Cook had to intervene to accelerate and avoid any vehicles coming from the left.

A fast approaching pickup truck dazzles Tesla Autopilot (FSD Beta v12.3) while the car was taking an unprotected left turn (UPL) at a complex intersection with variable traffic scenarios.
A fast-approaching pickup truck dazzles Tesla Autopilot (FSD Beta v12.3) while the car was taking an unprotected left turn (UPL) at a complex intersection with variable traffic scenarios. Credit: Chuck Cook / YouTube (watch the complete test video below).
Tesla Accessories by EVANNEX.
– Sponsored –

Chuck explained what happened in this attempt in his words:

So, that opposing truck blinded it and the car decided to stop in the lane of traffic. So, that was the reaction that I was afraid of based on that earlier turn where it just was acting like the lane is where it needed to do its waiting. That was a bailout scenario with fast-opposing traffic coming towards me. That truck jumped into the lane after it had committed and it created a scenario where it needed to get into the median and it didn’t in the timeframe I was comfortable with.

So, that was a tough one. That truck jumping in complicated it by an order of magnitude for sure but what I don’t like is its behavior so far to pause in the lane of the oncoming traffic to buy time, that’s not where you can buy time.

So, in most of the attempts, the vehicle performed better at these difficult UPLs but in some scenarios, it didn’t. According to Tesla, FSD Beta v12.3 is a big update (no release notes). It’s getting good reviews from the testers but still has a lot of room for improvement in scenarios encountered in Chuck Cook’s testing.

Let us know your thoughts on these tests in the comments box below.

Stay tuned for constant Tesla updates, follow us on: 
Google News | Flipboard | RSS (Feedly).

Video: Chuck Cook tests FSD Beta v12.3 (2023.44.30.25) at complex UPLs in Jacksonville, Florida.
– Advertisement –

More on Autopilot FSD Beta

Iqtidar Ali
Iqtidar Ali
Iqtidar has been writing about Tesla, Elon Musk, and EVs for more than 3 years on, many of his articles have been republished on CleanTechnica and InsideEVs, maintains a healthy relationship with the Tesla community across the Social Media sphere. You can reach him on Twitter @IqtidarAlii


Please enter your comment!
Please enter your name here

Latest News

The true story of how FSD V12 helped a Tesla owner reach hospital and saved his life

A Tesla Model Y owner from Asheville, NC shared his amazing experience of how Full Self-Driving V12 helped him...

Elon Musk to visit India soon and primarily focus on sustainable energy, not Tesla cars

Tesla (TSLA) CEO Elon Musk hinted that he intends to meet Indian Prime Minister Narendra Modi soon. He released...

Elon Musk discloses the Tesla Robotaxi unveiling date — know what to expect from the event

Tesla (TSLA) CEO Elon Musk posted the unveiling date of Tesla Robotaxi on his social media platform X (Twitter)...

Tesla FSD (Supervised) v12.3.3 goes wide release, triggers debate if it’s impressive or whacky (video reviews)

The latest stable release of Tesla Full Self-Driving version 12.3.3 (firmware version 2024.3.10). Tesla is rolling it out to...
- Advertisement -

Flight 4 Starship goes through 2nd static fire test, OLM gets repairs at Starbase, more

SpaceX conducted the 1st static fire test on Starship 29 (Ship 29) on Monday in preparation for the next...

Watch Starship Flight 3 (IFT-3) live stream recording and live updates from the SpaceX Starbase launch site

SpaceX has started live-streaming the Starship Flight 3 (IFT-3) launch and liftoff official coverage (watch below). We will be updating...

Starship Flight 3 (IFT-3) date falls on SpaceX’s 22nd foundation anniversary, FAA approves the launch

According to Elon Musk, SpaceX will attempt to fly the Starship for the 3rd time from Starbase, Texas in...

Tesla Tips & Tricks

Here’s how Tesla Car Wash Mode works

Teslas are undoubtedly the world's most sophisticated production cars...

Watch the Tesla Cybertruck front bumper camera washer in action and how it works

As the Tesla Cybertruck is getting into the hands...

Watch what happens when the Tesla Model 3 screen is smashed with a hammer while driving

A tech YouTuber Taras Maksimuk has performed a very...

Tesla Quarterly Reports & Eearnings

Tesla (TSLA) vehicle deliveries drop in Q1 2024 by 20% QoQ — but it still did better than BYD

Tesla, Inc. (TSLA) announced its Q1 2024 vehicle production...

Tesla (TSLA) achieves the 1.8 million vehicle delivery target for 2023 with a record-breaking quarter

In a press release yesterday, Tesla (TSLA) announced its...
- Advertisement -

You might also likeRELATED
Recommended for You