Can anyone confirm if radar cruise should work like this / does their radar cruise do the same?   ( i.e is is a design flaw or is my system faulty? )

 

Cruise set at 70mph. I feel my car slowing as I approach the car in front, indicate to pass and my car speeds up again as I start to move in to the overtaking lane. All OK so far.   At the last second I notice the car behind me had already moved in to outside lane and approaching at a rate of knots ( he / she obviously put their foot to the floor ). I decide to remain in my lane until Lewis Hamilton or who ever was driving, had passed. I switched off the indicator.

 

At this point I'd have expected my radar to once again detect the car in front and slow cruise down - but it didn't. I had to use the brake pedal.

 

Thinking it may have been a one-off, I tried the same manouver several times on the way home tonight. Once cruise had detected car in front, I'd indicate, move the steering wheel slightly as if I were over-taking but then switch off indicator and reamin in lane. Each time Radar cruise would the fail to detect the car in front.  A tad worrying if that's how the system works.

 

 

Edited 3 February, 20197 yr by Guest

It’s not a Fault in your system just a quirk.

 

My superb Mk3 does the same.  It’s almost like the system wasn’t designed to take that into account.

 

out of curiosity did you cancel you right indicator?  So long as the indicator is on I’ve noticed it continues accelerating.

 

When the ACC is on i now only use the “3-flash” function of the indicators (by pushing the stalk but so it doesn’t click into place) and also use a left indicator as that sometimes makes the ACC cancel the original manoeuvre.

Not really noticed on the previous one (not used it yet on this one), don't seem to recall it doing that.

 

Then again I tend to anticipate what's going on a couple of vehicles ahead, so usually take charge of it anyway.

17 hours ago, hwr1983 said:

out of curiosity did you cancel you right indicator?  So long as the indicator is on I’ve noticed it continues accelerating.

 

When the ACC is on i now only use the “3-flash” function of the indicators (by pushing the stalk but so it doesn’t click into place) and also use a left indicator as that sometimes makes the ACC cancel the original manoeuvre.

 

That's what I though, but cancelled indicator on subsequent tests - system just continues to accelerate to set cruise speed  - i.e. overrides the radar sensor.

 

Good idea re: 3-flash - I'll try it.

Edited 4 February, 20197 yr by Guest

17 hours ago, TheWanderer said:

Then again I tend to anticipate what's going on a couple of vehicles ahead, so usually take charge of it anyway.

 

I try to anticipate as well but the problem isn't with the car in front, its the unpredictability of the cars behind - if they decide to floor the accelerator pedal, there's not much you can do. Quite disconcerting when you expect radar to kick in and it doesn't. At least with std cruise I'd have expected to hit the brake or switch the system off to reduce speed.

 

Does make you wonder about fully autonomus vehicles tho - will we ever be comfortable with the on-board software? 

Edited 4 February, 20197 yr by Guest

3 hours ago, Scot5 said:

Does make you wonder about fully autonomus vehicles tho - will we ever be comfortable with the on-board software? 

No amount of lab testing or even road/track testing will ever be able to cover ALL situations that will be encountered on public roads, so the probability exists that even the most carefully and diligently written and tested software WILL behave in an "unhelpful" manner at some time.

 

The classic dilemma is whether to make an avoiding manoeuvre that will avoid the cars occupant being killed or injured but will result in a pedestrian being killed or injured - who will the fully autonomous vehicle software decide is more important? And what will the reaction be of the insurers and "ambulance chaser" lawyers be - who will they deem responsible and pursue for compensation, the driver or the car manufacturer?

It is a bit disconcerting when the speed starts to increase as soon as the right indicator goes on. Often on motorways it's necessary to indicate for quite a while before a space appears to let you out, and if you don't indicate you won't get a space.

I wonder how close to the car ahead the ACC will allow you to go before braking again. In any case, your signal should always come a few seconds before starting the manoeuvre to allow all the traffic around to register your intent.

Edited 4 February, 20197 yr by just music

1 hour ago, PetrolDave said:

No amount of lab testing or even road/track testing will ever be able to cover ALL situations that will be encountered on public roads, so the probability exists that even the most carefully and diligently written and tested software WILL behave in an "unhelpful" manner at some time.

 

The classic dilemma is whether to make an avoiding manoeuvre that will avoid the cars occupant being killed or injured but will result in a pedestrian being killed or injured - who will the fully autonomous vehicle software decide is more important? And what will the reaction be of the insurers and "ambulance chaser" lawyers be - who will they deem responsible and pursue for compensation, the driver or the car manufacturer?

 

Agree wih all of that.

 

Easy question to answer. The driver has to be in control at all times therefore it's the driver's fault, the only exception being North America where the driver would be able to sue the manufacturer; the pedestrian; the road builders; town and country planning dept, the emergency services who attended the sceneand the recovery truck driver. Basically, anyone but themselves.

Edited 4 February, 20197 yr by Guest

Just now, Scot5 said:

Easy question to answer. The driver has to be in control at all times therefore it's the driver's fault, the only exception being North America where the driver would be able to sue the manufacturer; the pedestrian; the road builders; town and country planning dept, and the emergency services who attended the scene. Basically, anyone but themselves.

But when an autonomous vehicle has no controls (which is their long term aim) there is no person who can be labelled as "driver", so then responsibility must lie with the manufacturer.