Intelligent Adaptive Cruise Control

[dgilles428]

I have noticed in the last few months my 21GTpe using Intelligent Cruise started slowing when it saw curve signs .. today I noticed it slowed when it saw a speed limit ahead sign .. had an indication under the cruise speed .. Is this part of a new update? Also, if cars are so good at reading speed and warning signs how come they still seem ignorant regarding stop signs?

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[JoeDimwit]

It’s part of one of the recent updates. I want to say it’s in the settings menu under “predictive Speed assist , in the same spot that intelligent Cruise Control lived.

 

[Mache_Nor]

It’s a bit off topic but let me just rant for a second how abysmal the update is and was! Now you cannot have speed sign recognition without predictive assist, which brings yo-yo madness when driving (brake before the turn, then accelerate when the turn starts so that midway the turn you are back at the original speed and have wasted tons of energy and comfort). There also is an unused button in the driving assists; intelligent speed reduction. It does nothing whether on or off. God forbid this setting could be the speed sign recognition and then all the predictions could be controlled by its own settings. Ugh!

 

[mdolan92869]

And the tendency to see the "55 MPH for cars towing trailers" sign and slam on the brakes when you're going 70, to then just bounce back up to 65 about 20 feet later when it sees the actual speed limit sign. It's gotten to the point that I know to keep my foot on the accelerator at certain spots along the freeway. Such a PITA!

 

[JoeDimwit]

It’s a bit off topic but let me just rant for a second how abysmal the update is and was! Now you cannot have speed sign recognition without predictive assist, which brings yo-yo madness when driving (brake before the turn, then accelerate when the turn starts so that midway the turn you are back at the original speed and have wasted tons of energy and comfort). There also is an unused button in the driving assists; intelligent speed reduction. It does nothing whether on or off. God forbid this setting could be the speed sign recognition and then all the predictions could be controlled by its own settings. Ugh!

I agree wholeheartedly. The slowing down for corners is way too aggressive.

 

[MBCook]

And the tendency to see the "55 MPH for cars towing trailers" sign and slam on the brakes when you're going 70, to then just bounce back up to 65 about 20 feet later when it sees the actual speed limit sign. It's gotten to the point that I know to keep my foot on the accelerator at certain spots along the freeway. Such a PITA!

Seeing the 45 sign on the road *next to* the freeway is worse.

I’ve had automatic cruise control speed adjustment turned off since like day three. It’s flat out dangerous.

I would like to try the new curve thing, but I’m never turning that combo option on. You have GPS. You know where I am. You have a map that knows the normal speeds.

You should be able to figure out false signs on side roads vs freeway.

 

[JoeDimwit]

Seeing the 45 sign on the road *next to* the freeway is worse.

I’ve had automatic cruise control speed adjustment turned off since like day three. It’s flat out dangerous.

I would like to try the new curve thing, but I’m never turning that combo option on. You have GPS. You know where I am. You have a map that knows the normal speeds.

You should be able to figure out false signs on side roads vs freeway.

The map doesn’t always know the posted speed. There are several locations near my home that the speed limit is 70, but it was 55, 60, or 65 depending on how far Bach you want to go, that the map still thinks the speed limit is the old one. I have reported them multiple times to the map company over the 5 years I’ve had my car. All with no effect. And you’re right, your vehicle going 70mph in traffic, then seemingly for no reason dropping to 55 is a recipe for someone getting very dead.

 

[MBCook]

The map doesn’t always know the posted speed.

That’s true. So I don’t expect it to be perfect. I just think it could be part of a heuristic.

Highways are all generally in the same speed band. In the US 65+. And it certainly wouldn’t be hard to keep the per-state highway speeds updated. They rarely change.

What I’m thinking more is just some very basic reasoning you could add. If you see a speed sign that is a very significant reduction on a protected highway, that’s suspicious.

If your map tells you there is a road next to the highway, seems to me there’s a pretty good chance you’re reading a sign on that road. On the other hand if the map tells you there are no other highways around then you’re reading a sign on the highway. May be wrong (the big truck example). And the bigger the difference the more likely it’s a mistake. No highway is likely to drop from 75 to 25.

Things don’t add up? Maybe you should just turn off automatic cruise control and warn the driver instead of doing something potentially dangerous.

I think it would also be smart to include the camera in all of this. You know which direction the car was facing, where in the image of the camera it was, how big it was, and how big speed signs are. That’s enough to come up with a pretty reasonable guess of how far away and in what direction the sign was. Which is enough to figure out if it was next to the highway or next to a road next to the highway. Of course that would have to come from the camera, it’s not Ford’s code.

I don’t know if other cars are better at this. My last car didn’t have any kind of speed sign recognition so it wasn’t something I ever had to think about.

Even though it does get it occasionally wrong, I DO appreciate the little speed sign on the dash from when it reads the roadside signs. It can be quite handy.

 

[JoeDimwit]

Im not trying to be argumentative. There is a reason they don’t just go completely off of map data… the amount of updating required to account for construction (doable) and emergency situations.would be almost unfathomable. The issue you’re having, that many of us are having, could be easily solved with blinders put on speed limit signs on service roads so the camera couldn’t see them, or maybe different fonts for various road types so the car would know that the sign it’s seeing isn’t for the road it’s on. The problem with this solution is that it requires a massive cost to the local governments to implement.​

 

[EagleDave]

Maybe it would be cheaper to paint a barcode across all lanes every couple miles with the speed limit.

Even better, a Botts Dot with a "proximity card" like passive data source for speed limit, road name, GPS coordinates...

 

[JoeDimwit]

Maybe it would be cheaper to paint a barcode across all lanes every couple miles with the speed limit.

Even better, a Botts Dot with a "proximity card" like passive data source for speed limit, road name, GPS coordinates...

That’s great, until there’s a construction zone.

 

[Misterrobot]

Seeing the 45 sign on the road *next to* the freeway is worse.

I’ve had automatic cruise control speed adjustment turned off since like day three. It’s flat out dangerous.

I would like to try the new curve thing, but I’m never turning that combo option on. You have GPS. You know where I am. You have a map that knows the normal speeds.

You should be able to figure out false signs on side roads vs freeway.

THIS!!!

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