Predictive slowing down for speed limit changes

McHoffa - Wednesday, February 6, 2019 - 9:51 am

When driving in Autopilot, and the speed limit drops, it doesn't slow down until the car has passed the speed limit sign, and when it does, it does so abruptly.

In some places, it drops and police sit just past the sign waiting for speeders. If you're going over after you pass that sign, they will pull you over.

Since the car knows the speed limit everywhere (even though it's wrong in some places), it would be cool if say 100 yards before the change, the car begins slowing gradually so that it is only going 5 over when it gets to the new speed zone. This would be much better than slamming on the brakes when it passes a sign, and would feel more like how a person drives.

I think this is  critical for AP!

When I approach my home town, the speed limit is 100 km/h and goes down to 50 km/h when entering the city. Driving with AP means, that it enters the city with 100 and recognizes the 50 about 60 meters later and slows down even too slow. 

This is not only an issue because of receiving speeding tickets, but a major safety issue. There is for example a bus stop after 70 meters and I still would have 80-90 km/h when passing it - and there are a lot of school kids...

Please fix that asap!

That's very important not only for AP but also for the adaptive speed control!

I suppose that it would require some changes in the recovery-tools, as for some reasons there seems to be less recovery when reducing speed in a "gliding" way* than by hitting the breaks so that everyone in the car makes a bow which is apparently the preffered mode by Tesla.

* With ordinary cruise control - the one I used to have on my old car - I turned off cruise-control before reaching the speed limit to reduce to the required speed and turning it on again passing the sign. This is not possible with the system Tesla has, because speed-control doesn't take current speed but the limit saved so when I try to do this it would accelerate to the previous speed again.