When you activate the ACC with adapt to speed limit on if you are driving less than 20mph it will set to 20. If you are doing more than 20mph it will set to the speed you are doing (don't know the figures if using km/h).
You can move it up and down with + and -
It will allow you to go up to the speed limit or your set speed, whichever is lower.
In the UK, most of the data is from Google Maps, not the camera. However the car camera picks up 'corrections'. (Road works, smart motorways, school 20s when lights flash - even when they are not flashing unfortunately, etc.)
As noted, it doesn't provide advance notice of a reducation in speed limit. However in the UK cameras are vary rarely at the reduced speed limit sign, usually some way after it - although the same cannot be said of police officers operating hand held detection devices. Which motorway are you on that has the camera actually at the sign as posed to after it?
And it won't accelerate to above the speed limit as you hsve left the speed limit. Good job. I know several drivers who have got fines and points for accelerating too soon and got caught out.
Adapt to Speed Limit
There are several stretches of A road in North Wales which switch to 50mph and immediately have an average speed camera within 50m of the speed sign and it doesn’t slow down nearly fast enough. There are warnings of ‘reduced speed ahead’ but of course the car doesn’t read / do anything with those.
If you are using the acc to slow down based on speed limit signs…you will be speeding for some amount of time whilst it makes the adjustment down. Kinda similar to if you started accelerating slightly before the speed limit increases again. But yeah, the car intentionally speeding up too early would obviously be stupid.
I’d be interested to know how this economical the change in speed is too. If I see a 50 coming up in a 70, I can coast and slowly fall down to 50. Whereas the car will quite quickly decelerate. I know it will regenerate during that, but interested if that regen is as good as simply rolling over a much larger distance.
If you are using the acc to slow down based on speed limit signs…you will be speeding for some amount of time whilst it makes the adjustment down. Kinda similar to if you started accelerating slightly before the speed limit increases again. But yeah, the car intentionally speeding up too early would obviously be stupid.
I’d be interested to know how this economical the change in speed is too. If I see a 50 coming up in a 70, I can coast and slowly fall down to 50. Whereas the car will quite quickly decelerate. I know it will regenerate during that, but interested if that regen is as good as simply rolling over a much larger distance.
Of course entering an average speed camera area over the speed limit isn't an issue as the speed is monitored over a quite long distance, and the minor infraction at the start would not raise your average speed enough to get you in trouble if you obey the rest of the limit.
2024 EX30 Ultra - single motor - extended range - Onyx Black (UK)
Thanks sp1959, I will give this a shot, its probably the only combination I didn't try. Foolishly I guess I thought it might work like the tesla I had a couple of weeks ago, you engage the acc it adapts to the speed limit (up or down) but it will not reduce the speed if the ambient speed limit is reduced.
One last thing did you find any useful documentation on the adapt to speed?
One last thing did you find any useful documentation on the adapt to speed?
EX30 Ultra Twin Motor Crystal White
None at all. Trial and error.
I like the car, but hate the manual - which isn't a manual, it's a manufacturer's/salesperson's sales pitch - with no actual help how to do anything (unless you count "this can be set in settings").
I like the car, but hate the manual - which isn't a manual, it's a manufacturer's/salesperson's sales pitch - with no actual help how to do anything (unless you count "this can be set in settings").
2024 EX30 Ultra - single motor - extended range - Onyx Black (UK)
OMG...finally thank to SP1959, I have managed to get the adapt to speed limit to work. Driving in an 80kph zone with ACC engaged as we enter a 60kph zone the car reads the road sign and slows to 60kph. OK it works, boy is it disappointing, it reaches the spot where the speed zone changes as immediately slows down, certainly not smoothly, kind of what you expect a learner to do on a first drive. Then as you exit the zone it "accelerates", which as we all know in the EX30, is rapidly!
The above is the case where the car manages to read the road sign, most of the time it will not adjust even though the dash indicates a lower speed limit than the ACC is set to.
Summary .... you spend so much time trying to work out if the "adapt to speed limit" is working that you would be better off adjusting the speed manually. This feature is such a waste of time I can't imaging depending on it. The best thing about it after all the effort trying to get it to work, when it did it gave me good laugh!
Happy driving all, at the end of the day it is a terrific car, and I do love it.
The above is the case where the car manages to read the road sign, most of the time it will not adjust even though the dash indicates a lower speed limit than the ACC is set to.
Summary .... you spend so much time trying to work out if the "adapt to speed limit" is working that you would be better off adjusting the speed manually. This feature is such a waste of time I can't imaging depending on it. The best thing about it after all the effort trying to get it to work, when it did it gave me good laugh!
Happy driving all, at the end of the day it is a terrific car, and I do love it.
EX30 Ultra Twin Motor Crystal White
-
andrewollason
- Posts: 258
- Joined: Wed Jun 26, 2024 3:43 pm
I agree, another feature I don’t see me using as it is too rough around the edges. Hopefully in time Volvo will refine the system either for this implementation or others.
Twin Motor Ultra
Normally it is good, but...
I too have had the ACC set on 'adapt to speed limit' but then drive at a higher speed than the car was recognisind and displaying in the information screen.
The ACC was set at 55. The car cruised at 55. The speed limit reduced to 40 and the car slowed down to 40. The speed limit reduced to 30. The car immediately showed 30 a the speed limit on the information screen. The car was bonging at me to warn that it was exceedng the speed limit. But still the ACC still showed 40 in green above 'D' and continued to cruise at 40.
It has done this twice at the same location.
How can two systems both not recognise the same speed limit? It doesn't make any sense. That alone would put me off using it.
I have learnt how to use ACC with adjust to speed limit at by trial and error, but I have given up on it and never use it. As RX30 says, it is anything but smooth. Harsh slowing down, harsh acceleration.
When not actually adjusting to speed limits it can cope well with slowing behind slower moving traffic. However it is very bad at dealing with stationary traffic in front - instead of spotting the stationary traffic and gently showing down, it hammers on up to it and then brakes really harshly. If the driver behind us tailgating you and not paying attention they could well rear-end you.
I can drive manually in a smooth and safe manner far better than the ACC can, so I have given up. (Although I do use the manual speed limiter to stop me accidently speeding up and breaking the speed limits. It is good because it used your eyes and your skills, and leaves you in full control.)
I too have had the ACC set on 'adapt to speed limit' but then drive at a higher speed than the car was recognisind and displaying in the information screen.
The ACC was set at 55. The car cruised at 55. The speed limit reduced to 40 and the car slowed down to 40. The speed limit reduced to 30. The car immediately showed 30 a the speed limit on the information screen. The car was bonging at me to warn that it was exceedng the speed limit. But still the ACC still showed 40 in green above 'D' and continued to cruise at 40.
It has done this twice at the same location.
How can two systems both not recognise the same speed limit? It doesn't make any sense. That alone would put me off using it.
I have learnt how to use ACC with adjust to speed limit at by trial and error, but I have given up on it and never use it. As RX30 says, it is anything but smooth. Harsh slowing down, harsh acceleration.
When not actually adjusting to speed limits it can cope well with slowing behind slower moving traffic. However it is very bad at dealing with stationary traffic in front - instead of spotting the stationary traffic and gently showing down, it hammers on up to it and then brakes really harshly. If the driver behind us tailgating you and not paying attention they could well rear-end you.
I can drive manually in a smooth and safe manner far better than the ACC can, so I have given up. (Although I do use the manual speed limiter to stop me accidently speeding up and breaking the speed limits. It is good because it used your eyes and your skills, and leaves you in full control.)
2024 EX30 Ultra - single motor - extended range - Onyx Black (UK)
-
andrewollason
- Posts: 258
- Joined: Wed Jun 26, 2024 3:43 pm
I find the ACC ok on the motorway with the lane assist disabled. You are right though if you are approaching stationary traffic it waits too late to slow the car down. Thats a pity as it does creep the car well if you do let it stop it. I have usually bottled out and slowed the car though. So for me it is really just radar controlled cruise which is ok but not the best I’ve tried. Disappointing as this tech has been around for a long time now. Guess they were trying to do a bit too much for the budget and didn’t get the basics quite right. I could say that about a few areas of the car to be honest.
Twin Motor Ultra
