[taylortbb]

Due to the current chip shortage they've moved to a vision-only system, as they had difficulty getting radar units in the quantity required. Until recently however, all Teslas had radar since ~2014. The high profile crashes are mostly/all radar-enabled vehicles.

The thing about automotive radar, and this isn't just Tesla, is that stationary objects are normally excluded. Otherwise the system brakes for things like overhead signs that have high radar reflectivity. Stopped cars, concrete barriers, etc are all basically invisible to most automotive radar.

Tesla also isn't the only manufacturer taking the vision approach. Subaru, for example, was doing vision-only emergency braking in 2016.

[baybal2]

> The thing about automotive radar, and this isn't just Tesla, is that stationary objects are normally excluded. Otherwise the system brakes for things like overhead signs that have high radar reflectivity. Stopped cars, concrete barriers, etc are all basically invisible to most automotive radar.

I believe most automotive radars in the last few years are FMCW exactly to accommodate adaptive cruise control.

[kalleboo]

When we bought our used Suzuki, one of the differences to another car we looked at was that ours had stereo vision AEB and the other had radar - one of the selling points by the dealer was that the camera version could detect stopped objects, which I always figured was half the point of AEB.