4 ms·

I think a big issue with that instance (monorail) is probably because they just threw out years of radar data without having a comparable reliability in place w

by flutas 5y ago

I think a big issue with that instance (monorail) is probably because they just threw out years of radar data without having a comparable reliability in place with the vision only. Completely mental that they are allowed to run this on public roadways.

Syonyk 5y ago
I'm not sure radar would help - the pillar is a stationary object, and car based radar tends to drop all returns at the same rate as the car is moving forward. Radar isn't terribly precise, so you end up with tons of returns off signs, bridge abutments, etc. Remember, with radar, Teslas will happily autopilot themselves into a semi truck across the road, stopped fire trucks, concrete road barriers, etc. I see no reason to believe that a stationary concrete pillar in the middle of the road would be avoided any better with radar than without.
- moralestapia 5y ago
  Here's what happened another time someone argued that "radar can't detect stationary objects". https://news.ycombinator.com/item?id=16722461 https://news.ycombinator.com/item?id=16722461 Radar does detect stationary objects, come on.
  - Syonyk 5y ago
    Yes, radar can easily detect stationary objects. Tesla's implementation of their radar processing drops all returns from anything stationary, given the forward speed of the car. In the context of a Tesla thread, I didn't think that needed to be specifically stated, but will do so in the future.
    - mcguire 5y ago
      Because, clearly, anything stationary is ground clutter that can be ignored.
      - moralestapia 5y ago
        Particularly if you're traveling towards it at 60 mph.
    - aeternum 5y ago
      A big problem with radar was the resolution. The radar signature of a highway overpass looks extremely similar to the monorail column. Emergency breaking on a highway when going under an overpass is also a huge problem, so radar may not be the answer.
TheParkShark 5y ago
It’s a stationary object. What source do you have to say Tesla deleted the date? Seems kinda foolish for a company like them to just throw data away. They even have data on lumbar support usage.
- flutas 5y ago
  > What source do you have to say Tesla deleted the date? Elon himself? Autopilot v9 itself does not use radar data at all[1], additionally cars manufactured from earlier this year on do not even have the radar modules[2]. Note, that I didn't say "threw out the data" in a silo, I said "without having a comparable reliability in place with the vision only." [1]: https://twitter.com/elonmusk/status/1397347380874203136 https://twitter.com/elonmusk/status/1397347380874203136 [2]: https://www.theverge.com/2021/5/25/22453518/tesla-vision-radar-autopilot-model-3-y-fsd https://www.theverge.com/2021/5/25/22453518/tesla-vision-rad...

by flutas 5y ago

Syonyk 5y ago

I'm not sure radar would help - the pillar is a stationary object, and car based radar tends to drop all returns at the same rate as the car is moving forward. Radar isn't terribly precise, so you end up with tons of returns off signs, bridge abutments, etc. Remember, with radar, Teslas will happily autopilot themselves into a semi truck across the road, stopped fire trucks, concrete road barriers, etc. I see no reason to believe that a stationary concrete pillar in the middle of the road would be avoided any better with radar than without.

moralestapia 5y ago
Here's what happened another time someone argued that "radar can't detect stationary objects". https://news.ycombinator.com/item?id=16722461 https://news.ycombinator.com/item?id=16722461 Radar does detect stationary objects, come on.
- Syonyk 5y ago
  Yes, radar can easily detect stationary objects. Tesla's implementation of their radar processing drops all returns from anything stationary, given the forward speed of the car. In the context of a Tesla thread, I didn't think that needed to be specifically stated, but will do so in the future.
  - mcguire 5y ago
    Because, clearly, anything stationary is ground clutter that can be ignored.
    - moralestapia 5y ago
      Particularly if you're traveling towards it at 60 mph.
  - aeternum 5y ago
    A big problem with radar was the resolution. The radar signature of a highway overpass looks extremely similar to the monorail column. Emergency breaking on a highway when going under an overpass is also a huge problem, so radar may not be the answer.

TheParkShark 5y ago

It’s a stationary object. What source do you have to say Tesla deleted the date? Seems kinda foolish for a company like them to just throw data away. They even have data on lumbar support usage.

flutas 5y ago
> What source do you have to say Tesla deleted the date? Elon himself? Autopilot v9 itself does not use radar data at all[1], additionally cars manufactured from earlier this year on do not even have the radar modules[2]. Note, that I didn't say "threw out the data" in a silo, I said "without having a comparable reliability in place with the vision only." [1]: https://twitter.com/elonmusk/status/1397347380874203136 https://twitter.com/elonmusk/status/1397347380874203136 [2]: https://www.theverge.com/2021/5/25/22453518/tesla-vision-radar-autopilot-model-3-y-fsd https://www.theverge.com/2021/5/25/22453518/tesla-vision-rad...