Auto Cruise Performance

[celltech]

I have noticed some interesting performance "issues" with the auto cruise and wonder if the rest of y'all see the same thing.

I have a drive to work where the road is more or less an S-curve. I turn left, then right and after ~100 yards there is a light. Speed limit is 40 mph with cruise set to the same.

If there is nobody in front of me, I come out of the right hand sweeper to a car stopped at the light. The cruise never sees the stopped car and I have to hit the brakes. I don't know if the AEB would kick in or not as it gets too close for my comfort level.

Funny thing is, the other day a car was stopped at the light, and as a car went across the intersection the cruise saw him and lit up the car icon on the dash, but as he passed it went away and I was still driving hard towards the stopped car.

If I am following another car and he has to stop at the light everything works great.

Be careful with all these electronics....they are not quite smart enough yet!!!

 

[williakz]

That sounds VERY bad, and I would report the problem IMMEDIATELY to Hyundai and government authorities (be careful of your facts, you could be in for some unwanted media attention considering the recent Tesla disaster). How sharp is the turn? Have you seen similar behavior on freeways or other road curves when using the speed/distance control system? Sounds to me like a possible mismatch between the steering angle input and the car's radar "lookahead" direction.

You may wish to CAREFULLY explore the system's (mis)behavior in a safer setting on a deserted freeway or divided highway with a friend in a second car. You could co-ordinate your activities using hands-free phones. Once you understand the system's operation in more detail, you will know the limitations of the system and can then decide whether it is safe to use at all or better left disabled until Hyundai can made repairs or modifications to it. My understanding is that most adaptive cruise control systems can be set to operate in "classic" mode to maintain speed setpoint only, which may be more familiar and predictable to you than the mixed mode automatic one.

Please be very careful in your operation of the system in ANY mode; make sure any surprises will not put you or others in danger. Remember the Tesla guy...

UPDATE: Appears to be a documented design limitation of the system. So no report to Hyundai or authorities is warranted. Just EXTREME caution when using the system (think left hand turners on two-lane highways).

 

[danygenesis]

That sounds VERY bad, and I would report the problem IMMEDIATELY to Hyundai and/or government authorities (be careful of your facts, you could be in for some unwanted media attention considering the recent Tesla disaster). How sharp is the turn? Have you seen similar behavior on freeways or other road curves when using the speed/distance control system? Sounds to me like a possible mismatch between the steering angle input and the car's radar "lookahead" direction.

You may wish to CAREFULLY explore the system's (mis)behavior in a safer setting on a deserted freeway or divided highway with a friend in a second car. You could co-ordinate your activities using hands-free phones. Once you understand the system's operation in more detail, you will know the limitations of the system and can then decide whether it is safe to use at all or better left disabled until Hyundai can made repairs or modifications to it. My understanding is that most adaptive cruise control systems can be set to operate in "classic" mode to maintain speed setpoint only, which may be more familiar and predictable to you than the mixed mode automatic one.

Please be very careful in your operation of the system in ANY mode; make sure any surprises will not put you or others in danger. Remember the Tesla guy...

According to the manual SCC doesn't work with stopped vehicles.

 

[javierdos]

according to the manual scc doesn't work with stopped vehicles.

YES


I've never had any problems with the system, but in my opinion is designed especially for roads or highways, roads with frequent curves is an overall discomfort, I prefer always take control

Best regards

 

[williakz]

According to the manual SCC doesn't work with stopped vehicles.

Thanks, I've added an UPDATE to my previous post.

I don't recall ever encountering the OP's situation. I'll give it a CAREFUL try with my vehicle and see if I run into the same behavior (oops, poor choice of words). I wonder what "capture speed" differentiates a "stopped" vehicle from one that is detectable by the system. Any ideas? Also, how does the system decide to come to a stop when the vehicle ahead comes to a stop? This would present the situation where the Genesis is moving toward a stopped vehicle and it seems to work. Of course, it would be in distance regulation mode instead of speed regulation mode. Very curious...

 

[Alwaysforward]

Mine works as designed and as noted in the manual. No issues here.

 

[GenesisAWD]

Mine works as designed and as noted in the manual. No issues here.

Same here. I absolutely love it and can't imagine buying another vehicle without that option from here on out. It's my favorite "new feature" that car manufacturers have come out with over the past 4 or 5 years.

 

[penga25]

think of the way the radar works...if there is no car directly in front of you, which on an S curve there wouldn't be, when you do get to a straight away or stop. the car in front is already too close for comfort. as someone else mentioned, the smart cruise is best on highways and relatively straight roads

 

[kn5owa]

Please be very careful in your operation of the system in ANY mode; make sure any surprises will not put you or others in danger. Remember the Tesla guy...

Tesla's big mistake was in marketing a package of safety options (many of which are a work in progress) under the "Autopilot " trademark.

There are fools out there who apparently think cars are being sold as actually having an autopilot capability, and drive accordingly - if you call that driving.

 

[SuperKing]

I pretty much only use the system if I plan to stay on an interstate for a long time... like the odd occasion I go from Vancouver to Seattle. I never use it in the city or short hops on the local highways, there's just too much traffic and I prefer to stay in control in those situations. But yeah, the manual shows a number of situations where the system will not work.

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[markpoisson]

I have noticed some interesting performance "issues" with the auto cruise and wonder if the rest of y'all see the same thing.

I have a drive to work where the road is more or less an S-curve. I turn left, then right and after ~100 yards there is a light. Speed limit is 40 mph with cruise set to the same.

If there is nobody in front of me, I come out of the right hand sweeper to a car stopped at the light. The cruise never sees the stopped car and I have to hit the brakes. I don't know if the AEB would kick in or not as it gets too close for my comfort level.

Funny thing is, the other day a car was stopped at the light, and as a car went across the intersection the cruise saw him and lit up the car icon on the dash, but as he passed it went away and I was still driving hard towards the stopped car.

If I am following another car and he has to stop at the light everything works great.

Be careful with all these electronics....they are not quite smart enough yet!!!

Why would you use your cruise at such low rate of speed? I generally use it only on the highway and at speeds above 65mph. Same with the lane departure.

 

[celltech]

Why would you use your cruise at such low rate of speed? I generally use it only on the highway and at speeds above 65mph. Same with the lane departure.

Why not? I am just playing around on a boring drive to work. I do agree that it works much better on the open freeway. It's too jerky around town even when it can see the car ahead. And oh, the max speed it will work at is 110 mph

I find it interesting that it can't find a stopped vehicle, yet it saw the car crossing the intersection....or it thought it saw something.

I think Tesla screwed themselves with the "Autopilot" name and will live to regret it. And how is it even legal for automakers to sell level 3 systems? Was there some big trial/test by the NHTSA that I missed?

And don't get me started on the lane departure feature. That thing blips in and out of seeing the road so much as to be useless, and even when it's working I can't figure out what it's trying to do. Sometimes it wanders back and forth across the lane like a drunk. But I love the cross traffic indicator and blind spot warning!

 

[williakz]

think of the way the radar works...if there is no car directly in front of you, which on an S curve there wouldn't be, when you do get to a straight away or stop. the car in front is already too close for comfort. as someone else mentioned, the smart cruise is best on highways and relatively straight roads

That's not accurate. The system reads in the steering angle and adjusts its "look-ahead" radar accordingly to "see" the vehicles ahead of you IN YOUR LANE in the turn and to discount those in other lanes making the same turn. You need to learn how the system operates (as do I).

 

[williakz]

Tesla's big mistake was in marketing a package of safety options (many of which are a work in progress) under the "Autopilot " trademark.

There are fools out there who apparently think cars are being sold as actually having an autopilot capability, and drive accordingly - if you call that driving.

Agree. You MUST be aware of the system's limitations PRIOR to relying on it to safeguard your LIFE and those of your loved ones. My first venture in to this tech was to buy the "passive" system so I could evaluate its efficacy BEFORE I even thought of purchasing the "active" system which would make decisions FOR me, whether I agreed with them or not...

 

[williakz]

I pretty much only use the system if I plan to stay on an interstate for a long time... like the odd occasion I go from Vancouver to Seattle. I never use it in the city or short hops on the local highways, there's just too much traffic and I prefer to stay in control in those situations. But yeah, the manual shows a number of situations where the system will not work.

OK, but that's NOT where we're going. Look at YouTube videos of Volvos and BMWs in heavy traffic. THAT'S where we're headed...

 

[markpoisson]

Why not? I am just playing around on a boring drive to work. I do agree that it works much better on the open freeway. It's too jerky around town even when it can see the car ahead. And oh, the max speed it will work at is 110 mph

I find it interesting that it can't find a stopped vehicle, yet it saw the car crossing the intersection....or it thought it saw something.

I think Tesla screwed themselves with the "Autopilot" name and will live to regret it. And how is it even legal for automakers to sell level 3 systems? Was there some big trial/test by the NHTSA that I missed?

And don't get me started on the lane departure feature. That thing blips in and out of seeing the road so much as to be useless, and even when it's working I can't figure out what it's trying to do. Sometimes it wanders back and forth across the lane like a drunk. But I love the cross traffic indicator and blind spot warning!

Gotcha - I've done the same on slower roads and found it more of a nuisance than practical. Also agree about Tesla - by being first mover and essentially beta testing with live customers (which Musk has admitted), they are exposed to serious lawsuits.

Like the Auto Cruise, I find the LDW to be useful only on the highway. Totally agree on the cross traffic indicator. It is actually fun to use in a parking lot. Works well out of my driveway too.

 

[waz]

That's not accurate. The system reads in the steering angle and adjusts its "look-ahead" radar accordingly to "see" the vehicles ahead of you IN YOUR LANE in the turn and to discount those in other lanes making the same turn. You need to learn how the system operates (as do I).

No, you are wrong. The system "sees" a relatively narrow angle directly in front of the nose of the car. It does not track cars in front of you in your lane through turns.

If you are in a sweeping turn, the nose of your car is not pointed at the car in front of you, so the system doesn't react until you both come out of the curve on a straightaway. Look at the illustration in the manual.

I know of what I speak because I live in the mountains and have experienced the same thing the original poster has. Many times.

 

[kn5owa]

No, you are wrong. The system "sees" a relatively narrow angle directly in front of the nose of the car. It does not track cars in front of you in your lane through turns.

If you are in a sweeping turn, the nose of your car is not pointed at the car in front of you, so the system doesn't react until you both come out of the curve on a straightaway. Look at the illustration in the manual.

I know of what I speak because I live in the mountains and have experienced the same thing the original poster has. Many times.

The owner's manual for my car has long lists of system limitations along with extensive discussions of the limitations of these "safety" features as follows:

AEB (auto braking) ---- page 5-49
LKAS (lane keeping) --- page 5-74
Cruise Control ---------- page 5-64

Hyundai's lawyers were obviously thinking ahead, and in this case, they are to be commended.

Anyone thinking of taking a "Tesla style" hands off joyride should carefully read their manual. Better yet, just don't do it. It's bad enough already to see people weaving all over the road because they're spaced out with their cell phones.

 

[williakz]

No, you are wrong. The system "sees" a relatively narrow angle directly in front of the nose of the car. It does not track cars in front of you in your lane through turns.

If you are in a sweeping turn, the nose of your car is not pointed at the car in front of you, so the system doesn't react until you both come out of the curve on a straightaway. Look at the illustration in the manual.

I know of what I speak because I live in the mountains and have experienced the same thing the original poster has. Many times.

If Hyundai's adaptive cruise control system "works" as you say, the following would occur IN LONG CURVES (as on a freeway):

1) your vehicle would change its behavior based on the speed/distance of vehicle(s) in lane(s) adjacent to yours;

2) your vehicle would fail to change its behavior based on the speed/distance of the vehicle ahead of you in your own lane.

Can you confirm that either or both of these situations actually occur?
(Note: I am not requesting that you test either scenario, only that your report your relevant past experiences.)

 

[StarPower]

I've found that the ACC can follow a car through a shallow curve, but will lose it once the curve exceeds a certain angle. I've also had it detect parked cars on the side of the road. In my experience, the sight lines shown in the manual seem pretty accurate.

And don't get me started on the lane departure feature. That thing blips in and out of seeing the road so much as to be useless, and even when it's working I can't figure out what it's trying to do. Sometimes it wanders back and forth across the lane like a drunk.

You can adjust the sensitivity of the Lane Keeping Assist or change it to warning only. Instructions are on page 5-76 of your manual.