DeRage
Testing shows Tesla's second-generation Autopilot firmware remains in its infancy, repeatedly locking onto center dividers as lane paths and drifting toward curbs under faded markings and solar glare.
AI-assisted summary of Tesla Autopilot 17.7.2 Fails — original source. Check the original for full context.
Source published:
Key ideas
- Tesla Model S Autopilot firmware 17.7.2 struggled severely with lane-keeping on rural and reserve roads, failing to negotiate curved concrete islands even at minimum speeds of 18–19 mph. (0:01)
- On marked two-lane side streets at 30 mph, the system repeatedly mistook the painted double yellow center divider for the lane track, straddling the center of the road into opposing traffic. (17:42)
- The host and viewers compared the raw, erratic performance of second-generation Autopilot (AP2) on 17.7.2 to the infancy of the original AP1 launch, expecting rapid over-the-air improvements. (21:45)
- Autopilot was capped below 35 mph on local roads, disengaging immediately at 37 mph, and failed to recognize dead-end signs or stop for red lights automatically. (17:42)
Detailed notes
## Background Published on YouTube by the channel DeRage on February 26, 2017, this video documents a real-world test of the Tesla Model S Autopilot firmware version 17.7.2. According to the video description, the creator aimed to evaluate the capabilities and limitations of the system, capturing several expected and unexpected failures during the drive.
## TL;DR The video features a hands-on test of Tesla's Autopilot firmware version 17.7.2 across various challenging environments, including a wildlife reserve, narrow side streets, and unmarked residential roads. Throughout the drive, the system repeatedly fails to maintain lane discipline, drifting over curbs at low speeds, straddling double yellow center lines at 30 mph, and ignoring a dead-end sign. While the host notes the system performs adequately on standard, busy roads, he highlights its severe struggles with faded markings, direct sunlight glare, and non-standard road widths. Ultimately, he draws comparisons to the early, primitive days of AP1 and outlines plans for future tests, including documenting the vehicle's hands-off safety lockout protocol.
## Atmosphere & style The video has the candid, unpolished feel of an authentic DIY road test, driven by the host's calm yet skeptical commentary. There is a palpable tension when the vehicle drifts toward curbs or oncoming traffic, contrasted by the host's lighthearted banter, such as jokingly pitching a tax-free 'Tesla Church' near local rural chapels. Watching the footage feels like sitting in the passenger seat of an early-adopter experiment, capturing both the nervous anticipation of system failures and a genuine curiosity about the rapid evolution of autonomous driving technology.
## Bulletin - [00:01](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1s) Tesla Model S Autopilot firmware 17.7.2 struggled severely with lane-keeping on rural and reserve roads, failing to negotiate curved concrete islands even at minimum speeds of 18–19 mph. - [17:42](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1062s) On marked two-lane side streets at 30 mph, the system repeatedly mistook the painted double yellow center divider for the lane track, straddling the center of the road into opposing traffic. - [21:45](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1305s) The host and viewers compared the raw, erratic performance of second-generation Autopilot (AP2) on 17.7.2 to the infancy of the original AP1 launch, expecting rapid over-the-air improvements. - [17:42](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1062s) Autopilot was capped below 35 mph on local roads, disengaging immediately at 37 mph, and failed to recognize dead-end signs or stop for red lights automatically.
## Key takeaways - [00:01](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1s) Direct solar glare combined with faded white lines severely hindered camera vision processing during initial testing. - [00:01](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1s) Autopilot failed repeatedly to negotiate a curved concrete traffic island at 18–19 mph, drifting toward the grass and requiring manual intervention. - [00:01](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1s) The digital instrument cluster display showed inaccurate vehicle positioning relative to actual painted road markings. - [00:01](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1s) The operational speed ceiling on local side roads locked out Autopilot above 35 mph, disengaging if pushed to 37 mph. - [00:01](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1s) The system successfully detected forward traffic and managed slowing down, but failed to recognize or stop for red traffic lights. - [17:42](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1062s) Autopilot executed an unprovoked hard phantom-braking event on an open roadway without forward obstacles. - [17:42](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1062s) On a marked 30 mph side road, Autopilot locked onto the double yellow center line as the middle of its path rather than staying centered inside the travel lane. - [19:18](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1158s) The vehicle completely crossed into the opposing travel lane while approaching a dead end, failing to register dead-end or no-trespassing signage. - [21:45](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1305s) Narrower road widths and subtle curbs caused the system to drift erratically across center markings even when painted lines were crisp. - [21:45](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1305s) Viewers and the driver drew parallels between early AP2 releases like 17.7.2 and the rough initial customer rollout of Mobileye-based AP1. - [23:48](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1428s) On completely unmarked roadways, Autopilot attempted tracking but required manual disengagement when oncoming traffic approached. - [23:48](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1428s) Lane tracking immediately recovered once standard painted lane markings reappeared past an unmarked intersection. - [23:48](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1428s) Future testing plans included wearing a head strap camera mount and intentionally testing the escalation sequence of hands-off steering wheel alerts.
## Detailed walkthrough ### [00:01](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1s) Autopilot Struggles in a Wildlife Reserve
DeRage begins testing the latest Tesla Model S Autopilot firmware (version 17.7.2). After being dissatisfied with his camera angle in a video shot the previous day, he adjusted his setup to give viewers a clearer vantage point of the road and dash. The test begins on an empty road inside a wildlife reserve with no traffic or bystanders around. Almost immediately, the system acts up when the lane markings end, failing to keep the car centered and drifting straight over the line. Driving directly against the glaring sun complicates vision processing further, making it difficult for the vehicle to detect faint, aged lane markings.
When the Tesla approaches a curved concrete traffic island, the system fails to negotiate the bend entirely, aiming straight off the road toward the grass. Because the test is taking place in an isolated nature preserve with only open grass at the roadside, the host intentionally lets the vehicle drift until intervention is necessary to prevent a collision with the curb. Even at minimal speeds of 18 to 19 mph, the car refuses to track the curve, forcing manual overrides. DeRage observes that while the system senses the curb, it relies heavily on clear white lines to guide its trajectory, which are faded here.
```mermaid flowchart TD accTitle: Autopilot Wildlife Reserve Curve Failure accDescr: Diagram illustrating the failure sequence of Tesla Autopilot navigating an island curve in the reserve. subgraph S1["Environmental Inputs"] A["Faded White Road Markings"] B["Direct Sunlight Glare"] C["Raised Concrete Curb / Island"] end subgraph S2["Autopilot Processing"] D["Computer Vision Misinterprets Road Edge"] E["Instrument Cluster Shows Incorrect Position"] end subgraph S3["Vehicle Reaction & Driver Action"] F["Drifts Toward Island Grass"] G["Driver Intervenes to Avoid Curb Impact"] end A --> D B --> D C --> D D --> E D --> F F --> G ```
- System firmware tested: Tesla Autopilot version 17.7.2. - Testing speed through the reserve curves: 18 to 19 mph (18 mph is the absolute lowest operational speed set by the driver). - Environmental challenge: Direct sunlight heading directly into the forward-facing camera system combined with faded lane markings.
> “So this road is in the middle of nowhere so and um it's probably going oh look at that act up already you did not know what to do once the lanes uh finish also we're going against the sun right now so we're doing this test good thing there's nobody around us and we're over the line already I don't know if you guys can see that um we found the middle of the right lane now there's this little island over here I don't think it'll be able to negotiate it and look at that it did not negotiate that at all um and obviously I just let that happen because are in the midd of nowhere it's just grass and no Wildlife we harmed we're in a Wildlife Reserve um and there is nobody else around and it can never make this uh turn back so it turns from the island is notices the curb but uh it basically does not find the white line I mean you know for this is a old white line you know kind of like Fad in and stuff but still it should be able to to negotiate this turn um I guess it's it relies a lot on the white line as you guys can see we're also going against the sun which doesn't help very much let's see I en a little late and we're going to D in the grass again unless I correct it and we're going like you know 19 M an hour uh the lowest the we can go is 18 which basically is no change whatsoever but you know I want to do this test I don't want to hit the curb U because you know that time it looked like it was actually going to hit the curve so on this road autopilot is not working very well um but you know it's kind of to be expected I suppose so let's see if it's going to do this one no I don't want them okay I think we're going to have to go and try in other the roads because this road is basically a disappointment and if you go fast and slow it doesn't doesn't seem to impact it all right yeah obviously I wouldn't try this in a regular road but um and I don't know if you guys can see the actual Dash the lines right you might be able to see the lines over here when we making the curve uh he thinks we're in the middle of the road when we're not he thinks we're like over the line when we're not so enable again and he not going to do it I guarantee it so that's the state the autopilot is on right now oh maybe almost so almost did that last one but if you if you notice the um on the screen over here you see that it thinks uh when I'm going the right way it thinks the line is further to the right and is not all right so oh takes a few seconds to recognize the lines after the curve so let's see this one they all the same I mean they all the same um measurement and things like that maybe you'll do this one yeah actually did this one but then we go right in the middle of the uh of the other line of the other Lane right so he actually did one guys uh but you did not help because s do in the left lane at least it's mud enough to know that's in the wrong place afterwards right um yeah but that is uh what is it 17. 7.2 something like that forw so I just want to do another video probably like drive out of here into another local road which no traffic and I took control there because there was a little uh um bump in the road and just for the heck of it let's up the speed on this one uh I don't go let's see 30 no yeah so uhoh they closed oh no I thought they closed the gate on me I was going to say no but they Clos the entrance I'll be stuck in the reservation the Wilderness reservation that would not be pretty at all all right so let's try on this road this road is fairly quiet as well it's a very local Road it's a very small road too so that is that might be a problem in itself um it's already going in the middle of the road but I'm going to let it go because I just want to see what it's going to do it's right in the middle does not see these Lanes at all and there's cars behind me now so not behind but they're going to turn behind me so I'm basically taking over so that did not work let's see yeah and if you look at the display I am not over the white line uh in the side but it thinks that I am so that's what's important the camera it's not very um accurate yet as far as like the you know knowing where the line is and whatnot cuz it thinks I'm over it right now and I'm not I'm close to it but not over the line but like I said it's a small not not small but like um not a very wide a narrow world that's the word I was looking for so we got to wait for this light might take a while yay imagine that you opened finally all right now let's see can we use it here yeah we can use it here but I don't trust here too much cuz it's actually a busy road one thing I noticed too that if I speed above 35 it doesn't disengage right away I think if if I go like 36 it still works oh no at 37 it disengages but I can actually go 36 without I did it before anyways all right so you know right now it's on autopilot there's some traffic over here so it should stop let's pray and it does um they fix the bug on the display but the cars don't turn blue yet they turn white and we're going against the Sun so it's working pretty good and here we go and now he wants me to hold the steering wheel so we'll do that so he keeps on driving happily car slowing down in front of us and slows down that's good yeah so there's some traffic so we actually get to use in a normal road and it works pretty good in a normal road so far everybody's passing me though so I got to go yeah because it's very slow 35 is not going to cut in this road at least for now for a long time people going to be seeing damn electric car so slow man them slow autopilots so there's this road uh that's not really a road it's like a community just going to go there but I mean it is a road but inside of a community I'll test for another few minutes so we can see how it works I want to try this I don't know what's going to happen but okay going to slow down here manually because the car is about to turn and the sensor prob wouldn't see him not yet not without an update okay green light even if it wasn't we could turn on red thanks Flor there it's pretty good so we go 35 cuz it is a 45 M hours uh miles an hour here but we can actually turn off over there and uh yeah we're going to take over we'll turn off in the uh side roads over here then we can test all we want and should be very uh quiet as well not as busy as this so I noticed that right now well yeah right now a pilot is not available so whenever you go above 35 it doesn't even show the option to be available okay we're going to turn here I think it's another Community but there should be some local roads for us yeah it is a community but don't matter we just need to be quiet and safe 35 35 mile lanes are a little bit faded so now it's good let's see is he going to turn am I yes it turned I don't know why but I don't trust the the single you know the broken down whatever it's called the lane the middle that's when it's yellow it tends to go over for some reason like right now it's trying to negotiate it trying to figure out but it's very much to the left and now oh take over there don't want to hit the sign and now it's not available because they're fading so one thing I noticed yesterday did much better I don't know if it was the weather I think it was it could have been the weather I don't remember if it was really sunny I thought it was really sunny but yesterday he worked a little bit better um recognizing um Lanes without actually having Lane on him today seems to be a little bit worse see but what are we going to do speed up a little bit so we can take this light cuz we don't want to be waiting half an hour again these lights can take a while all right so 35 again as long as there is nobody behind me I don't mind it and there's two lanes too so they can pass oh they want so since yesterday I must driven like maybe like 20 miles on autopilot if I were to guess maybe more just testing it and you know just seeing how he behaves and basically training the fleet no okay so people must drink I'm drunk sometimes cuz I mean drives okay but not a perfect driver by any means at all so I don't know what people think but hopefully not that I'm drunk call the cops I'm not even driving it red light is it going to stop at the red light no but why not man it should but it won't so okay but we stopped actually they should have turned here but they didn't awkward silence honestly I don't want people think I'm crazy nobody thinks that anymore everybody talks some speaker phones inside the car I remember when Bluetooth first came out you thought people were crazy talking you know to themselves inside the car that was a thing nobody used to talk you know when Bluetooth renew and stuff now once the lane closes then we can go still green to turn even though nobody's going to turn that's why you L musk need to work on make it like lights be smarter cuz they're not very smart right now yeah yeah went over the spill limit not spill limit but the uh autopilot limit yeah this road it's not very good for testing at all actually there is no roads in here they are very good for testing um I know this one's not but you know at least we got to use it a little bit that test was very telling at the uh Community well not Community uh the what”
[17:42](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1062s) Line Detection Failure and Lane Straddling at 30 MPH
After driving past what he refers to as the reservation, the host experiences an abrupt and jarring reaction from the Tesla Model S. Without any apparent obstacle ahead, the vehicle applies a hard, unprompted brake. He dismisses the sudden deceleration as completely unnecessary and turns onto a side road, noting that he needs to head toward the gym area where his son is finishing up. Turning onto this stretch of asphalt, he prepares to evaluate how the newly released 17.7.2 Autopilot build manages standard roadway markings, which here consist of clear outer white shoulder lines and a painted double yellow line down the center.
Setting the vehicle’s cruise speed to 30 mph, the driver watches the instrument cluster and the steering wheel closely. Despite the markings being clearly visible to the human eye, the Autopilot system fails to distinguish the travel lane. Instead of centering the car between the right edge line and the center stripe, the car tracks directly over the center divider itself. The driver expresses disbelief as the vehicle locks onto the yellow divider line as if it were a target track, centering the car squarely down the middle of the entire road. Frustrated by the car's inability to recognize obvious visual boundaries, he exclaims, “I don't know why but it's like does not see those lines at all I don't know if you guys can see it I can certainly see the lines but the car autopilot does not see it look at that it goes right in the middle it takes us a line to follow the bdle it's like okay I should follow this line it's right you know keep it in Keep It Center keep in the middle but no.”
```mermaid flowchart TD accTitle: Autopilot Road Tracking Behavior accDescr: Sequence of road conditions tested on firmware 17.7.2 and the corresponding Autopilot failures and interventions.
subgraph MarkedRoad["Marked Two-Lane Road (30 MPH)"] A["Double Yellow Center Lines"] --> B["Autopilot misidentifies center stripe as lane center"] B --> C["Car straddles center line into opposing traffic"] end
subgraph ChurchRoad["Dead-End & Church Stretch"] D["Approaching Dead End"] --> E["Car fails to detect 'Dead End' / No Trespassing"] E --> F["Manual turnaround by driver"] end
subgraph NarrowUnmarked["Curved & Unmarked Roads"] G["Narrow Road with Curbs"] --> H["Vehicle drifts over center line on curves"] I["Unmarked Roadway"] --> J["Oncoming traffic appears"] J --> K["Driver manual takeover"] end ```
- Autopilot executed an unprovoked hard phantom-braking event on the open road. - The test road features standard outer white lines and double yellow center lines. - At 30 mph, Autopilot centered the chassis directly over the double yellow line rather than staying inside the lane.
---
[19:18](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1158s) Dead-End Turnaround and Church Tax-Exemption Banter
As the car continues straddling the roadway, the driver approaches a section of the road where local church members are gathered outside selling food. Not wanting to look foolish or cause a scene by letting an autonomous system swerve erratically in front of pedestrians, he takes active control to smoothly navigate past the crowd. Once past the gathering, he reactivates Autopilot to see if it can recover its lane discipline. The vehicle once again drifts completely across the yellow line, putting the car entirely into the oncoming lane. Approaching the physical end of the paved route, the driver observes that the car shows no signs of slowing down or acknowledging the "Dead End" sign ahead, forcing him to intervene before encroaching on a private property boundary marked with "No Trespassing" signs.
Surveying the turnaround point—a rustic, neglected lot littered with aging parked vehicles and abandoned structures—the host notes that this quiet corridor is predominantly lined with rural churches. While turning the car around, he jokes about the tax advantages enjoyed by religious organizations and whimsically pitches an idea for EV enthusiasts: “if you have a church tax free can we make like a Tesla Church electric car Church how's that we can buy tesus tax free.” Turning back in the opposite direction, now with the sun behind him rather than directly blinding the front-facing cameras, the car still fails to hold its lane, drifting directly back over the center line as an oncoming vehicle approaches in the distance.
- The vehicle drifted completely over the double yellow divider into the opposing travel lane. - Autopilot did not decelerate or stop for the dead-end signage at the end of the road. - The area featured minimal traffic due to ongoing church services, offering an isolated environment for testing erratic steering behavior.
---
[21:45](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1305s) Narrow Curves and Comparing AP2's Infancy to Early AP1
Heading back along the winding side street, the host analyzes potential reasons why firmware 17.7.2 struggles so severely on this specific stretch. The road is narrower than standard highway lanes and winds through subtle curbs, though the painted lines remain reasonably crisp rather than faded. Even at the modest speed limit of 30 mph, the car repeatedly drifts across the yellow stripe while rounding bends, demonstrating that the system struggles with non-standard road widths and tighter radiuses.
Reflecting on the rough state of the software, the host acknowledges feedback from viewers who watched his previous day's upload, drawing comparisons between this second-generation Autopilot platform (AP2) and the early release cycle of the original Mobileye-based Autopilot (AP1). He explains that when AP1 first launched to customers, it exhibited similar primitive behavior, but rapidly matured through successive over-the-air updates. Looking forward to future improvements, he notes: “so autopilot is in its infancy I think some I you know my video that I posted yesterday somebody said it's the same it looks feels the same right like autopilot one was when it first got released but then they said the good news is that improves quickly from there at least autopilot one did improve quickly from there so that is the hope as well with the this autopilot version two.”
- Non-standard, narrow lane widths with curbs cause the vehicle to wander across the dividing line during 30 mph sweeping turns. - Viewers compared the erratic lane-keeping performance of AP2 firmware 17.7.2 to the initial rough launch of AP1. - Expectation remains that Tesla's internal neural net development will rapidly close the gap, mirroring the fast upgrade curve seen in earlier hardware generations.
---
[23:48](https://www.youtube.com/watch?v=UZ1XLqc5IUg&t=1428s) Unmarked Roads, Camera Mounts, and Future Hands-Off Nag Tests
The test drive proceeds toward a four-way stop where severe solar glare directly impairs the driver's line of sight, making it difficult to judge the arrival order of cross-traffic. Once the intersection clears, he turns onto an unmarked residential road with no painted lines whatsoever. While Autopilot attempts to track the road boundaries on its own and initially does an acceptable job, the driver disengages the system immediately when oncoming traffic approaches, unwilling to gamble on the car's judgment with other motorists nearby. A moment later, after reaching another stop sign and turning back onto a street with clear markings, the Tesla promptly locks onto the visible lane lines without incident.
Wrapping up the video, the driver addresses the production aspects of his testing series, discussing camera angles and mounts. Having tested an improved placement inside the cabin, he shares plans to use an elastic GoPro head strap mount on future drives so viewers can see an authentic driver-perspective view, unconcerned with whether wearing a head strap looks goofy on camera. He also outlines his next specific test: deliberately ignoring the steering wheel "hands-on" alert to document the system's exact abort procedure. Describing his upcoming test agenda, he states, “another thing I want to do is um I wanted to let it basically you know when they show the alert for no hand you know to to hold the wheel if I don't do it I want to test it what happens I know what happens but I want to make sure it happens the way supposed to with this new firmware version.”
- Tested Autopilot on an unmarked road surface with no painted center or edge lines; manual disengagement was required due to approaching opposing vehicles. - Firmware 17.7.2 reacquired lane tracking instantly once standard road markings reappeared past the stop sign. - Upcoming testing planned: evaluating the visual/audible steering wheel nag and the automated lockout protocol when hands remain off the wheel.
## Mentioned Tesla, Tesla Model S, Autopilot, Autopilot 1 (AP1), Autopilot 2 (AP2), Mobileye, Elon Musk, DeRage, GoPro, Amazon
## Video description I wanted to test the latest Tesla Model S autopilot firmware to see what is capable or incapable of doing. There were several fails some expected some not. As an amazon influencer I may earn a commission from qualifying purchases by using this affiliate link.
[Source](https://www.youtube.com/watch?v=UZ1XLqc5IUg)