JdeBPOct 16, 2025

Turning on all of the "driver assistance" features in the #FordKuga gives an idea of what fully automated driving would be like.

It's bad.

Traffic sign detection has decided that all NSL signs mean a 30 mph speed limit, which plays merry Hell with dual-carriageway and motorway driving.

Automatic cruise control setting adjustment causes rapid and sudden deceleration *right at the point of* passing speed limit signs.

Speed limit signs perfectly legible to humans are missed. Nonexistent speed limit signs are hallucinated from vehicle decor.

Adaptive cruise control causes high acceleration into the leading vehicle on bends. It also does not bring the vehicle to a complete stop if the leading vehicle stops.

I can see why #AshleyNeal calls lane centring "the cyclist killer". It also self-cancels on many A and most B roads I use.

The ironic feature of it all is that one has to spend all of one's time on one's toes actively fighting what the vehicle does.

#SelfDrivingCars

Show threadColin Haynes

@JdeBP

I mean - that's quite funny though.

"Traffic sign detection has decided that all NSL signs mean a 30 mph speed limit, which plays merry Hell with dual-carriageway and motorway driving."

Oct 16, 2025 at 10:45amWeb
Show threadJdeBPOct 16, 2025

@ColinHaynes

It's funny to relate.

But it's terrifying to experience when you are toodling along the M25 at 60mph, it reads an NSL sign from somewhere, decides that you're doing 30mph over the speed limit, slams the brakes on hard, and the traffic behind almost runs into you.

The worrying thing is that this seems to be related to the well-known decade-old #FordKuga problem of the SatNav aerial failing. It failed when parked in a 30mph zone, which is why, I suspect, it thinks that NSL means 30mph. Because otherwise it is a bizarre default.

So (if this hypothesis is correct) from a computer programming view it's one of those nasty problems that one cannot replicate unless something else has failed in a particular way.

#SelfDrivingCars #SatNav #GNSS

Show threadColin HaynesOct 16, 2025

@JdeBP yes - I can imagine.

My car has adaptive cruise control which I like but it, too, has problems with bends.

And I'm not sure I would want FSD. I've been in IT for too long; no such thing as big free code.