[aaronbeekay]

Do you have a source for this? There’s a gap between semi wheels, sure, but the deck height of a semi trailer in North America is about 48”. If automotive radars weren’t able to detect objects above this height, they would miss a lot of obstacles…

One automotive radar I’m familiar with, the Bosch MRR [1], lists a vertical FOV of ±15 degrees, and a 300 m maximum detection range. Assuming the sensor is mounted perpendicular to the ground at 0.5 m high, it should be able to see the top of a 13’6” semi trailer from ~15m away all the way up to its full range.

Teslas don’t have radar anyway, so of course this wouldn’t have helped, but an AEB radar that can’t see the top of a semi truck isn’t very useful.

[1] https://www.bosch-mobility.com/en/solutions/sensors/front-ra...

[vsskanth]

Radars are usually tuned to ignore them because they don't have the fidelity to differentiate between a trailer on it's side and a tunnel and it leads to phantom braking.

[aaronbeekay]

Sure, but that’s a lot different from not being able to see them at all.