[stephengillie]

Does the Tesla driver assistance package often confuse highway signs with large trucks? From parent comment's link:

> Situation: When autopilot is engaged, it somehow sees some shadows/images, and it brakes pretty hard even though no car is in front of you. It does not come to complete stop, but it will go from 65-70 to 45 pretty quickly.

Conditions: Typically for me it has been driving in the dark (evening or early morning) and going under an underpass. I am not sure if others have seen this during the daytime or other conditions.

Another driver's description sounds like Google Maps getting confused by overpasses:

> It just happened to me today when I went under an overpass. The GPS based speed thought I was suddenly off the freeway and on the surface street overpass and said limited autosteer speed to 45. Luckily I had my foot on the accelerator so I could override it but it just jolt me a bit trying to slow down.

[toomuchtodo]

That’s exactly the problem. It’s a radar discrimination/GPS resolution/mapping data fusion issue.

They’re pushing hard on the front facing radar to avoid accidents like the fatality of the Floridian driver who wasn’t paying attention when the tractor trailer crossed the road, and false positives are the side effect. Better to rapidly decelerate then be dead.

[coldtea]

>Better to rapidly decelerate then be dead.

Even better to non-rapidly decelerate when it's not needed, since that can also have one killed.

[stephengillie]

What if cars had rear adaptive cruise sensors? They could modify their follow distance by averaging the follow distance of the car behind them.