4 ms·

This is not true for Teslas, and I've tested it (in a safe environment) in my own. It uses vision, as well as radar, to detect obstacles, and will brake from hi

This is not true for Teslas, and I've tested it (in a safe environment) in my own. It uses vision, as well as radar, to detect obstacles, and will brake from highway speeds to zero when there is a car stopped ahead.

xeromal 6y ago
I don't think it's guaranteed though. I've noticed the same as you, but I've also had it lock the brakes after seeing a shadow (lol) and I've had it speed up to 70 mph on Topanga Canyon Blvd (speed limit 45 mph) and nearly run into a parked semi.
taneq 6y ago
This varies based on exact hardware revision, software revision including OTA updates, and active settings at the time. I don’t think anyone but Tesla can make any definitive statement about the behaviour of any given car at any given point in time.
- Dah00n 6y ago
  That's insane! That alone should make it illegal on the road.
  - taneq 6y ago
    I agree and I can't fathom why this is an unpopular opinion. It's bad enough when my phone or computer suddenly works differently (or not at all!) due to mandatory OTA update. It'd be terrifying if it my car's safety features could do the same.
mshook 6y ago
Except the kind of radar used in a Tesla cannot do that for you hence while the AP ignores static objects and crashes happily into parked cars, fire trucks, ... Here's an explanation of why written on here a long time ago by @chowells: https://news.ycombinator.com/item?id=16239612 https://news.ycombinator.com/item?id=16239612 This user wrote: To add even more detail, as there still appears to be a lot of confusion: The radar systems in these vehicles send out a radio pulse in a broad approximate-cone forward. They get bounces back from everything that reflects radio in front of them. Distance from the object is calculated by time between pulse and response. Speed towards/away from the object is calculated from Doppler shift of the radio frequency. There are two main things that these systems can't detect. 1. Speed of the object perpendicular to the direction of radio wave travel. 2. Location of the object within the approximate-cone the radio pulse travels in. Note that thanks to the second, you can't calculate the first with higher-level object tracking, either. So the data you get back is a list of (same-direction velocity component, distance) pairs. There's no way to distinguish between stationary objects in the road and stationary objects above the road, to the side of the road, or even the surface of the road itself. Radar just doesn't provide the directional information necessary to handle obstacle detection safely.

xeromal 6y ago

I don't think it's guaranteed though. I've noticed the same as you, but I've also had it lock the brakes after seeing a shadow (lol) and I've had it speed up to 70 mph on Topanga Canyon Blvd (speed limit 45 mph) and nearly run into a parked semi.

taneq 6y ago

This varies based on exact hardware revision, software revision including OTA updates, and active settings at the time. I don’t think anyone but Tesla can make any definitive statement about the behaviour of any given car at any given point in time.

Dah00n 6y ago
That's insane! That alone should make it illegal on the road.
- taneq 6y ago
  I agree and I can't fathom why this is an unpopular opinion. It's bad enough when my phone or computer suddenly works differently (or not at all!) due to mandatory OTA update. It'd be terrifying if it my car's safety features could do the same.

mshook 6y ago

Except the kind of radar used in a Tesla cannot do that for you hence while the AP ignores static objects and crashes happily into parked cars, fire trucks, ... Here's an explanation of why written on here a long time ago by @chowells: https://news.ycombinator.com/item?id=16239612 https://news.ycombinator.com/item?id=16239612 This user wrote: To add even more detail, as there still appears to be a lot of confusion: The radar systems in these vehicles send out a radio pulse in a broad approximate-cone forward. They get bounces back from everything that reflects radio in front of them. Distance from the object is calculated by time between pulse and response. Speed towards/away from the object is calculated from Doppler shift of the radio frequency. There are two main things that these systems can't detect. 1. Speed of the object perpendicular to the direction of radio wave travel. 2. Location of the object within the approximate-cone the radio pulse travels in. Note that thanks to the second, you can't calculate the first with higher-level object tracking, either. So the data you get back is a list of (same-direction velocity component, distance) pairs. There's no way to distinguish between stationary objects in the road and stationary objects above the road, to the side of the road, or even the surface of the road itself. Radar just doesn't provide the directional information necessary to handle obstacle detection safely.