> "Radar is limited, as long as trailers in the US are allowed to have such high gaps to the ground."
One of these crashes involved a firetruck, which unlike a semi-trailer, does not have a large gap underneath it.
Radars are limited period. The radars used by Tesla lack the angular resolution to distinguish between a stationary object next to the road (e.g. a building or parked car) with a stationary object parked right in the middle of the road.
One of these crashes involved a firetruck, which unlike a semi-trailer, does not have a large gap underneath it.
That fire truck wasn't crossing the road, it was at the road side, which creates a different situation. The problem with high trailers is, that they very much look like a bridge to a radar. In any case, a proper side bareer can prevent deadly accidents.
If the radar cannot distinguish between a bridge with five meters of clearance and a "bridge"(trailer) with a single meter of clearance, then the radar simply lacks the angular resolution to be effective. It's the same exact issue as it being unable to distinguish objects on the side of the road and objects in the middle of the road.
It's insufficient angular resolution for the application, no matter which way you slice it.
The radar that companies people on HN don't think highly of sell to the government is "scary good" and that's just the decade+ old tech that I'm familiar with.
I'm sure there's reasons Tesla doesn't/can't put that in cars though.
It's nice and all that the military has such cool radars, but how much do those systems cost? How large are they? What sort of power requirements do they have? What sort of duty cycles do they have? And can they legally be exported?
Elon caving and adopting Lidar is probably more likely.
One of these crashes involved a firetruck, which unlike a semi-trailer, does not have a large gap underneath it.
Radars are limited period. The radars used by Tesla lack the angular resolution to distinguish between a stationary object next to the road (e.g. a building or parked car) with a stationary object parked right in the middle of the road.