this post was submitted on 16 Mar 2025
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They originally the model S had front facing radar and ultrasonic sensors all round, the car combined the information to corroborate it's visual interpretation.
According to reports years ago the radar saved Tesla's from multiple pileups when it detected crashes multiple cars ahead (that the driver couldn't see).
Elmo in his infinite ego demanded both the radar and ultrasonics be removed, since he could drive with out that input so the car should be able to.. also it is cheaper.
I'd be very curious to know how much cheaper it is. Sure, there's R&D to integrate that with everything, but that cost is split across all units sold. It feels like the actual sensors, at this scale, can't add a significant amount to the final price.
Back when Elon made avoiding LiDAR a core part of his professional personality, it was fairly expensive. But as any tech genius can tell ya, component prices drop rapidly for electronics.
Now, radar is dirty cheap. Everything has radar. Radar was removed from Teslas. A radar sensor for my truck is $75, probably much less at scale orders.
LiDAR sensors cost anywhere from $500-$1,500 for a vehicle of this type, near as I can tell (this type being Level 2 autonomy rather than something like a Waymo. A well-kitted out self-driving vehicle has 4 LiDAR sensors).
Here is the LiDAR module currently used on the Mercedes S-Class, it's $400 used: https://www.ebay.com/itm/285816360464
It's a hideously small cost-savings in 2025 for a luxury vehicle like a Tesla. Any rational company would've reversed course after the first stationary-object-strike fatality. Tesla is not a rational company.
Exactly, my previous car (BMW) once saved me in the fog by emergency braking for something I wasn't able to see yet. My current car (Tesla) shuts down almost all safety features when the camera's can't see anything, so I doubt it will help me in such situations. The only time my Tesla works well is in perfect conditions, but I don't live in California.
If you were driving at a speed at which the low visibility would have gotten you into into an accident due to some obstable you weren't able to see yet, you were driving too fast. Simple, isn't it?
While true, it's still nice that super-human senses are looking out for the driver on their behalf. Also it's nice if super-human senses allow for braking earlier and closer to graceful rather than standing hard on the brakes because of late notice.
Fog is one example, but sudden blinding glare could be another situation that could be mitigated by things like radar and lidar. Human driver may unexpectedly be blinded and operating at unsafe speed without any way of knowing that glare was coming in advance.
As you say, it's nice if there is an additional assistant, also for e.g. health emergencies.
That said: Driving assistants should only ever be that: assistants. They are not a replacement for safe and controlled driving. I know I've been an arsehole on some occasions when I had my driver's license fresh, and I got lucky that I didn't have any accidents until I learned to calm down and drive with respect for other people and animals. Just throwing that in here to say I don't consider myself a saint. But anything "self driving" should be forbidden everywhere, unless it's on rails that the vehicle can not reasonably escape even if it wanted to (i.e. trains).
These things will make people more complacent and lazy, and will absolutely lead to worse drivers and more collisions