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I'm interested in that video, to learn how long in advance of the crash the FCW triggered. If it's online somewhere do you have a link?

I visited @TrafficEng today and rode in his company Tesla while he talked about his experience and insights into Tesla system behavior. He pointed out something that hadn't occurred to me, which is that there is a delay after Autopilot detects the previous lead vehicle for TACC has left the...

Yes, since this test was done by Thatcham Research, the same company that designed the dummy car used in the Euro NCAP tests, I assume they made sure the dummy car in the filmed tests would have been recognized by the Tesla radar as an obstacle. I believe the dummy cars used for the NCAP tests...

I just saw a partial answer to whether current Teslas engage AEB for stationary vehicles here Insurers warning on 'autonomous' cars . The researchers in the video are the same ones who developed the fake car used for Euro NCAP testing of forward collision warning ("FCW") and automatic emergency...

I don't have evidence about higher-speed Tesla AEB performance yet, but did find encouraging actions that the European New Car Assessment Program ("NCAP") recently started to test AEB, FCW, and the combination for speeds up to 48 miles per hour (80 kilometers per hour). From here...

Whether AEB works at a faster initial speed of 25 mph when approaching a stationary object is what I was exploring with the original poster above. It definitely works up to the speed that IIHS tests, as the report I linked shows. Whether it works at higher speeds is not clear. I suspect it does...

I care because I want people to understand what a vehicle they own or consider buying should be expected to do in dangerous situations. The IIHS and European NCAP tests are a good start, but as this discussion illustrates, their published results are not adequate at this point to answer...

I'm not confused. You said "Since AEB doesn't kick in for stationary objects" and i gave proof that it does at least in the 25 mph and under cases tested by the IIHS. Neither of us has proof it does or does not at speeds over that. Lacking the proof, I say I suspect it does, and without...

I absolutely agree. It's all about confidence in the sensor data and resulting analysis, and the auto companies and manufacturers of collision warning systems (typically for commercial vehicles) have varying strategies for balancing true positives & true negatives with false positives & false...

One more data point is this video that shows the Tesla traveling at 30 mph, detecting a truck stopped partially blocking its lane ahead, and slowing until the driver took control. (That section starts about timestamp 6:11.) A caveat is that the truck was moving but did not appear in the...

You continue to express your opinion as fact, in spite of the test data I quoted for you. The FACT is that the IIHS test for AEB is for a stationary target. Other tests, especially by the European NCAP program, involve moving targets too, but not the quoted IIHS test. Tesla's implementation...

Data? No, here are data, from 2017 Tesla Model S that proves that the evaluated Tesla detected a stopped vehicle and completely stopped from initial speeds up to 25 miles per hour, the highest initial speed that IIHS tests. Now, we can't tell from this how well does it reacts at higher initial...

A fire truck certainly has more flat surfaces than cars. However, from these photos taken by the fire department, it looks like the one parked slanted in the oncoming Tesla's lane in California had lots of metal surfaces at various angles. So especially since it is metal, I think plenty of...

If an object is made only of flat surfaces and they are all slanted with respect to the approaching radar, then little of the radio wave emitted by the radar will be reflected back to it, making the object difficult to detect. That's the reason that stealth aircraft have flat surfaces and sharp...

You're absolutely right about the Hardware 2 radar. I knew better than I typed.

I'm not familiar with the Infiniti's radar, but the Bosch MRR in Hardware 1 Teslas and the Continental ARS410 in Hardware 2 and 2.5 Teslas are more sophisticated than a simple Doppler radar. Plus, starting with software 8.0 Tesla added technology to improve stationary-object detection for their...

My understanding is that object identification was part of Mobileye's vision technology. If so, then for AP1 Teslas before the software 8.0 update, a visual identification of potentially-blocking objects was a consideration in Tesla's algorithms that decided whether a dangerous situation...

I read all that before commenting. I'll be happy to respond to specific items, but here are some overall points: 1) All owners' manuals are written with legal liability in mind, so although they are accurate, they seldom fully explain everything, especially what the product's functions are or...

It is puzzling, if the Tesla had a clear view of the fire truck (rather than following another vehicle that swerved out of the way, as someone knowing the driver reported about the California fire truck accident) and didn't respond. Apparent evidence that Teslas with recent software updates do...

On re-reading, I see I was not clear enough above. I can't edit that post again, so here's a clarification. I won't be surprised if Tesla's technology continues to improve, but "improvements are coming" was meant to refer to the entire industry, not just Tesla.

Some pieces of the technology are there, and improvements are coming. The video below, starting at its 6:10 point in time, shows a Tesla responding to a stopped truck, and even though it is only partly blocking its lane. It's not clear whether the truck was ever detected by the radar before...

I suspect those maps are still being used in Tesla's "fleet learning for radar" approach for stationary object detection. That is, they give greater confidence, when driving along a path in the map shown as blue, when a stationary object is detected ahead that seems to be in the travel path...

Passive optical sensors (including cameras) don't directly measure speed or distance. Spaced sensors (e.g. stereo cameras) can compare results and estimate distance if not too far away, like our eyes allow our brains to do. They deduce speed by observing how quickly the size of an object...

I didn't notice this discussion about stopped vehicles under an overpass until now, a little after I gave a related answer in post #60 here: AEB Won’t Prevent an Accident . I think it is likely, when a vehicle is stopped under an overpass or overhead sign, that even when the vehicle is not...

I don't know how Tesla is implementing their approach, beyond what they have reported and what I've seen reported by people in forums like this one. So I don't know whether vision is currently being used, after Tesla changed their approach in software version 8.0 as explained here Upgrading...

Sorry -- I only addressed one of your three questions. After the Florida accident, Musk tweeted that the radar saw the crossing tractor-trailer but mistook it for an overhead object. Tesla addressed that issue with their "fleet learning for radar" introduced with software version 8.0. What...

Please see my answer in post #56 in this thread to a similar point by chillaban. Also, here are comments related to your point about the tested vehicles not stopping in time when initial speeds were above 25 - 30 kph. I suspect the sensors in those vehicles detected the stationary object at...

I worked for a company in the 1990s that designed, manufactured, and sold radar collision warning systems for heavy vehicles (mainly class 8 trucks). I assure you that our systems responded to stationary objects, and when they had enough confidence that the detected stationary object in the...

Someone claiming to know the driver posted on Reddit that the Tesla was following another vehicle, and the driver couldn't see the fire truck until the lead vehicle swerved into another lane. The driver reportedly said he didn't have time to avoid the collision, and wasn't sure whether his...

All cars did not have lidar. As you said yourself, one car had radar only. You said that radar can't detect stationary objects. That car with radar only DID detect and respond to the stationary object. That was my point. Here in the U.S., the Insurance Institute for Highway Safety ("IIHS")...

You are wrong. The physics for the radars you describe and those for automotive radars are the same, but the implementations for automotive use are not as you imagine. For proof, see the following illustration from here...

Here Effectiveness of forward collision warning and autonomous emergency braking systems in reducing front-to-rear crash rates - ScienceDirect is a study showing impressive results for AEB, too. Forward collision warning helped, automatic emergency braking was better, and combined FCW & AEB was...

From news I saw, NTSB has not re-opened an investigation. They and NHTSA teams were sent to gather information. Based on that, each will decide what if anything else is warranted. I believe the earlier post's "CID" was probably a typo, and actually meant "CIB" for crash imminent braking...

In Tesla vehicles, FCW and AEB are activated every time the vehicle is started. Either or both can be deactivated during a particular trip, but then re-activate at the start of the next trip. So by default both are active. As for limitation, I have not seen tests reported for Tesla, but see...

Continuing from above, the European test approach here http://cdn.euroncap.com/media/26358/euroncap-2017-volvo-s90-datasheet.pdf shows examples of auto-braking from speeds too high to avoid a crash with a stationary vehicle, but those tests aren't being reported for current vehicles. Here is...

Yes, and in fact the European AEB tests with stopped vehicles call 30 mph (50 km/h) "slow speed" and have a second 48 mph (80 km/h) "high speed" test. See the table below from http://cdn.euroncap.com/media/1384/aeb-test-results-esv-2013-0-a837f165-3a9c-4a94-aefb-1171fbf21213.pdf . They...

First, here's a general point: many of the auto OEMs describe their adaptive cruise control function ("ACC", called "Traffic Aware Cruise Control" or "TACC" by Tesla) separately from their forward collision warning ("FCW") and automatic emergency braking ("AEB") functions. It seems like...

See this from here 2017 Tesla Model S to see that the tested Model S traveling at 25 mph did in fact avoid a collision with a stopped vehicle. The vehicle in the accident should have had the same radar unit, but may have had different software than version 8.1 in the tested vehicle. Note that...

Here are a few points: 1) Tesla changed approach for dealing with already-stopped vehicles in late 2016, starting with software 8.0, for both hardware 1 and hardware 2 vehicles. See Upgrading Autopilot: Seeing the World in Radar . Assuming the Model S in the accident had its software updated...

This is likely the unit http://www.u-blox.com/sites/default/files/NEO-M8P_DataSheet_%28UBX-15016656%29.pdf . It offers carrier phase and carrier doppler outputs, both of which George mentioned in the video.

On re-watching, I see that your vehicle kept slowing because of the slow-moving vehicle in your lane ahead. You didn't start speeding up again until it had turned out of your lane. If it had not thought the stopped vehicle was in your lane, I think you would have slowed down for the slower...

I believe the alert and slowdown were because the stopped vehicle in the oncoming lane was briefly thought to be in your lane. If you look at the projected lane lines in the instrument panel when the alert sounds, you can see the stopped vehicle shown just inside the left lane-line. When the...