My Honda has all of those (some of which I have to switch ON and others such as Collision Mitigation Braking and Pedestrian detection and braking I can't) and the sign recognition frequently misreads a 30 sign as 80.

My Jag has all of those and far more.

If anyone gets sign recognition misreads, it can help to pull a squirt of screenwash to clear the view for the cameras.

I've never seen mine show an 80 for a 30. I think in the UK the speed limit data embedded in my satnav would suppress that misread.

The few misreads I get are mainly missed (temporary) derestriction signs, following on from some (temporary) small roadworks limit signs, so the intelligent speed limiter occasionally thinks it's still in a speed-limited zone and has to have its button pressed. Oo er missus.

Lane keep assist is dubious. OK it should shake the steering wheel at drivers falling asleep. But it shakes if I switch lanes without indicating, when I know there is nothing at all behind because I've already checked and the radar traffic detector hasn't buzzed in my mirror, so the system also knows there's nothing coming.

All this EU mandated stuff is adding up to a pricey packet on a new car, and it's yet more stuff to go wrong and costly to fix and an MoT failure if it's not working (for a lot of it). TPMS batteries are u/s after say 5 years so pay ££ for new units all round or fail your MoT.

More unwanted EU guff on my car is Deployable Bonnet (or Pedestrian Safety System). If the sensors think you are hitting a pedestrian, then Bang the airbags push the bonnet up to an incline and its hinges are detonated; and the bent bonnet and bashed bumper and airbags need replacing, say £4k just to give the jaywalker a gentler ride.

And even if we're out of the EU, these rules will most likely be adopted and still apply to us anyway.

Dales.

nuvi 2599LMT-D, oregon 700, basecamp, memory-map.

You're travelling down a 50mph road, doing 50mph.

Up ahead is Mr Sunday driver doing ~40mph.

You don't know the area, you start the safe overtake and then you are confronted by a speed reduction to say 40mph.

The 'system' slows you to 40mph, side by side with Mr Sunday which has now turned a safe overtake into a potentially fatal one.


As for the exercise of ensuring every new car has a system so the roads limit is accurately known - best of luck getting that implemented. I've seen pictures of parallel roads with different limits and the cars camera has read the wrong one.
New cars with pristine screens, OK, but a few years down the line, a few almost invisible stone scratches.

It's all going to end in tears.

Satnav:
Garmin 2599 LMT-D (Indoor test rig)
DashCam:
Viofo A119 V3
Car Average MPG :

If it ever happens I'll buy a new car at the last possible moment without such devices and run it as long as I can, can't even stand the current crop of gadgets and switch them all off, including stop/start and hill assist.

Where there's a will ... there's a way.

The latest crop of 'hill assist' also known as 'brake hold' is designed to apply the brakes when you're stationary.

However, when applied it puts the brake lights on dazzling the occupants behind.

I always 'considerately' apply my handbrake lever when stationary so I don't dazzle those behind. Unlike the latest crop of vehicles with complicated parking brakes so drivers tend to sit at lights with their foot firmly planted on the brake pedal = I sit a car length+ back, often to the annoyance of the driver behind me.

I don't want to be dazzled or suck in extra exhaust fumes.

Satnav:
Garmin 2599 LMT-D (Indoor test rig)
DashCam:
Viofo A119 V3
Car Average MPG :

My wife's car doesn't have a handbrake, all done electronically although there is a switch so you can manually apply the 'handbrake' if needed. Must say I've never noticed the brake lights being on, must check that as it's one of my pet hates, ignorant drivers sitting with their foot on the brake pedal and so dazzling the driver behind. Apart from which if the car behind drives into them then without the handbrake applied they'll shoot into the car in front of them, if there is one, or be pushed across a junction if there isn't with potentially horrific consequences.

Where there's a will ... there's a way.

You keep banging on about it when you don't even have a car with Brake Hold. I keep on telling you K. Put the damn handbrake on. The brake lights then go off. You don't even have to let the handbrake off.

The only possible down side to this in a manual car is the you have to put on the handbrake (only if you want to prevent dazzle and in an auto, you have to put it into park, THEN manually put it back into Drive) on a level road whereas you might not normally (but should) because you can't be assed to let it off again.

And why should we give a damn anyway as most of the other drivers out there don't?

Well, I'm not worried - either they'll stop selling cars or I'll shuffle off this mortal coil not too far along the calendar.

Dennis

If it tastes good - it's fattening.

Two of them are obesiting!!

My car has the camera to read the speed limit signs. Sometimes it will see a 30mph sign on an adjacent slip road and flash a warning even though I'm still on the main carriageway.
Also the system has switched to kph a couple of times, which then causes a permanent indication.

EDIT: Example of 30mph sign that always gets 'seen' is here StreetView link