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Unexpected breaking during autopilot

Unexpected breaking during autopilot

Yesterday I was diving on the expressway at 70mph using autopilot. It was a sunny day and as I passed under an overpass my car breaked hard as if there was an object in the way but there was nothing. I jumped on accelerator immediately but car behind me had to brake as well. Could the darker area under the overpass have triggered this?

lilbean | 20. August 2019

Yes. I expect unexpected braking so I just don't use it. Money wasted.

TeslaTap.com | 20. August 2019

More likely the overpass itself triggered braking. It returns a huge reflection to the radar that looks like a huge object in the road. If the video processing can't ensure there is nothing there, brakes applied - so a shadow might contribute to it too.

Tesla seems to be handling this on a case-by-case basis. I've found around the bay area (with heavy Tesla owner population), it never brakes now for overpasses, although it did on a few a year ago or so. A guess is after so many vehicles pass an overpass with inappropriate braking, Tesla inserts a flag at that GPS spot to ignore radar. It may also be that HW3 is needed to better resolve the situation.

drm | 20. August 2019

Thanks for your response. Does this location need to be reported to Tesla? I’m not sure how they get this information.

sabboldiyayehlogne | 21. August 2019

I have an idea. What if we took buses, made them all electric, but instead of hooking up an ICE generator or hauling huge ass battery around we added wires along the routes? Wires could be hung well above the road surface and power drawn using special contact poles. This way lateral movement is achieved and traffic wise they would be the same as normal buses. Analysis is of course needed, but depending on transport network density not having a huge ass battery could as well pay for installation of the overhead wires.

jimglas | 21. August 2019

@drm: Submit a verbal bug report if this happens

inconel | 21. August 2019

I have seen electric buses with pantograph to get power from overhead wires in Budapest for example. It's not a new idea. But how does it relate to phantom braking when going through underpasses?

charliecharles303 | 21. August 2019

I have an idea. What if we took buses, made them all electric, but instead of hooking up an ICE generator or hauling huge ass battery around we added wires along the routes? Wires could be hung well above the road surface and power drawn using special contact poles. This way lateral movement is achieved and traffic wise they would be the same as normal buses. Analysis is of course needed, but depending on transport network density not having a huge ass battery could as well pay for installation of the overhead wires. https://getappvalley.com/ https://tutuappx.com/ https://tweakbox.mobi/

i agree!!