2012 Smart Cruise Control--braking

[hhgenny]

Sorry if this has been covered (I have searched for quite awhile and found some info, but not enough).

I felt the brakes apply when I had cruise control set and got too close to the car in front of me. Two questions/comments;

1. How hard will the brakes be applied if there is a sudden slow down in front?

2. I found one person state that the brake lights come on when when SCC brakes. I would feel more confident if I could hear a few others confirm it.

Thanks for your help.

 

[skcbb]

dont know about brake lites but i was behind a car that was exiting freeway and slowed down and my smart cruise braked real hard and continued to brake hard till i changed lanes. i wish i could disable the smart part of the cruise if and when i want

 

[tonygxp]

cant comment on the brake lights but would have to assume they come on whenever the brakes are used. reason being the following experiment i conducted with the adaptive cruise on mine.

Try setting the cruise at whatever traffic conditions permit on a residential street. leave the distance set to farthest (the default). when you're behind someone the cruise will back off (if he/she is going slower, all common occurrences when using this feature) then as the car in front slows to a stop ie stop sign, traffic signal, etc, place your foot over the brake but don't depress the pedal. the car will come to a complete stop (as long as the car in front did) and then the cruise will chime at you, like an alert and display something in cluster, i forget what, but it tells you the cruise has cancelled. if you're on a highway in heavy traffic you can use this as long as traffic continually moves and doesn't make you come to a complete stop as well (did this on I95 in VA in the heavy rain traffic was moving between 25-55mph, was awesome)

so for the brake light question, how irresponsible would it be for a car mfr to NOT have the brake lights light up if the car can take you down to zero?? that's why i would have to believe they would come on.

 

[Ernie3647]

Sorry if this has been covered (I have searched for quite awhile and found some info, but not enough).

I felt the brakes apply when I had cruise control set and got too close to the car in front of me. Two questions/comments;

1. How hard will the brakes be applied if there is a sudden slow down in front?

2. I found one person state that the brake lights come on when when SCC brakes. I would feel more confident if I could hear a few others confirm it.

Thanks for your help.

http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=6916

Hope this helps

 

[BacktoHyundaibychoice]

1. Very
2. Yes, brake lights come on.

 

[waveman]

IMO, smart cruise is one of the car's best features. I just came back from a trip that included everything from two-lane roads to multi-lane freeways. I found driving much less tiring than in any of my previous cars. Of course, seat comfort and other things had something to do with it, but the cruise control helped a lot, too. Because the system took care of traffic ahead slowing, I was able to relax a bit more.

Periodically, though, I would get behind a car or truck traveling more slowly than I would have liked, but not so slow as to grab my attention by "seat of my pants" feel or on the speedometer. I wish the display indicated any drop below the set speed, just as it does when you manually accelerate beyond the set speed. Has the display changed at all for 2012?

 

[Genesiswannabee]

I am picking up my 2012 4.6 at Fitzgerald in Clearwater one week from today. I will then be spending three weeks in The Villages and driving back to CT on 8/30 stopping along the way to see some people. I am very much looking forward to using the adaptive cruise control. That was one of my prime drivers in purchasing the Genesis along with the Lexicon system and the improved ride for 2012.
Larry

 

[037]

smart cruise control is great in every situation except 1, sudden traffic stops.

If you're cruising at anything over 50mph and the cars in front of you are doing 0, the greatest distance on the cruise control won't give you enough room to slow down without whacking the car in front of you.

My Acura RL, no matter what cruising distance you pick, looks forward at maximum distance to prepare the CMBS system (collision mitigating braking system).

It's irresponsible to have a cruise control system without some sort of a warning if you're approaching an object too fast. I mean...you'd actually have to pay attention to traffic conditions!

 

[BacktoHyundaibychoice]

smart cruise control is great in every situation except 1, sudden traffic stops.

If you're cruising at anything over 50mph and the cars in front of you are doing 0, the greatest distance on the cruise control won't give you enough room to slow down without whacking the car in front of you.

My Acura RL, no matter what cruising distance you pick, looks forward at maximum distance to prepare the CMBS system (collision mitigating braking system).

It's irresponsible to have a cruise control system without some sort of a warning if you're approaching an object too fast. I mean...you'd actually have to pay attention to traffic conditions!

If the car(s) in front of you is moving and comes to a sudden stop you will too. They system works great that way.
OTOH...
If the car(s) is stopped at a light or for some other reason, and it was NOT moving in front of you, you're right: it isn't recognized and your car won't stop.
So the question is, under what circumstances are you doing 50 MPH and come upon stopped cars suddenly? Coming over a hill or around a very sharp curve perhaps? Cuz if it was a straightaway you'd certainly have seen them in advance, right? And the specific exclusions from the OM include hills, curves, pedestrians, motorcycles, and severe weather as times to not use/trust the smart CC.
Bottom line for me:
I love this system, I trust this system to do what it says it does (even more at times: picks up most cyclists, works well in rain). But I'm always ready to intervene if needed. Trust but verify.

 

[037]

the only scary part is when traffic is moving well, you stay on your cruise on like 70mph and all of a sudden you see the cars stopped in front of you.

It has to click in your head to stop the car, because if you don't the car won't have enough distance to do it on it's own.

Just a point to trust the system but still think for your self ALL the time.

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[BacktoHyundaibychoice]

the only scary part is when traffic is moving well, you stay on your cruise on like 70mph and all of a sudden you see the cars stopped in front of you.

It has to click in your head to stop the car, because if you don't the car won't have enough distance to do it on it's own.

Just a point to trust the system but still think for your self ALL the time.

That just isnt true. If the cars in front of you come to a sudden stop you will decelerate very quickly from 70 to 9. Try it, you'll like it.
Further, the car will SLAM on the brakes faster than you could ever react. Though how your scenario of 70 to a standstill could happen escapes me.

 

[037]

That just isnt true. If the cars in front of you come to a sudden stop you will decelerate very quickly from 70 to 9. Try it, you'll like it.
Further, the car will SLAM on the brakes faster than you could ever react. Though how your scenario of 70 to a standstill could happen escapes me.

Braking, 70–0 mph: 169 ft

that's 2011 335is BMW. Now put on your cruise control and tell me if you're 100ft away from the car in front of you.

http://www.caranddriver.com/reviews/car/10q3/2011_bmw_335is-short_take_road_test

you will crash and I guess you won't be surprised anymore.

 

[waveman]

Braking, 70–0 mph: 169 ft

that's 2011 335is BMW. Now put on your cruise control and tell me if you're 100ft away from the car in front of you.

http://www.caranddriver.com/reviews/car/10q3/2011_bmw_335is-short_take_road_test

you will crash and I guess you won't be surprised anymore.

According to the owners' manual, at 50 MPH the system maintains a separation of about 180' at the #3 setting. Even if the car in front decelerates very rapidly, under decent conditions there should be enough time to stop. (The manual doesn't say if or how the distance varies with speed, though it would make sense for it to do so.)

In a situation like that, however, I would hit the brakes myself, though I've noticed that the SCC responds very quickly whenever someone cuts in front of me and doesn't pull away.

 

[037]

According to the owners' manual, at 50 MPH the system maintains a separation of about 180' at the #3 setting. Even if the car in front decelerates very rapidly, under decent conditions there should be enough time to stop. (The manual doesn't say if or how the distance varies with speed, though it would make sense for it to do so.)

In a situation like that, however, I would hit the brakes myself, though I've noticed that the SCC responds very quickly whenever someone cuts in front of me and doesn't pull away.

"Do not use the cruise control
when it may not be safe to keep
the car at a constant speed, for
instance, driving in heavy or
varying traffic, or on slippery
(rainy, icy or snow-covered) or
winding roads or over 6% up-hill
or down-hill roads."

I have a digital version of the owners manual, there is no mention of the distance the cruise control is good for.

there is one brilliant idea in there though for turning cruise control off:

"Increase the vehicle speed to more
than approximately 125 mph (200
km/h)."

https://www.myhyundai.com/static/download/sedanownermanual.pdf

 

[BacktoHyundaibychoice]

037:

I'd still like to read a scenario of how a car in front you goes from 70 to 0 without the SCC recognizing that and responding accordingly. By definition, the car you're following must decelerate to get there. So will you.
Do you have SCC? Have you run into a situation that caused this alarmism? If so please share. If this is just hypothetical on your part, please let us know that too so we stop responding with real world examples.
Thx.

 

[waveman]

I have a digital version of the owners manual, there is no mention of the distance the cruise control is good for.

It was in an older version of the manual, probably for the '09 or '10 model (see attached). I don't know if they've changed the separation distances for '11 or '12.

there is one brilliant idea in there though for turning cruise control off:

"Increase the vehicle speed to more
than approximately 125 mph (200
km/h)."

Haven't tried that yet.

Basically, I agree that you have to be vigilant using the SCC, but it's much better than the single speed controls I've had before.

 

[037]

037:

I'd still like to read a scenario of how a car in front you goes from 70 to 0 without the SCC recognizing that and responding accordingly. By definition, the car you're following must decelerate to get there. So will you.
Do you have SCC? Have you run into a situation that caused this alarmism? If so please share. If this is just hypothetical on your part, please let us know that too so we stop responding with real world examples.
Thx.

my concern came from a real world scenario, which is why it was scary to me.

Here's the basic situation. You got cruise control at 70, 65 limit. There are no cars in front of you so you're going 70.

then you hit traffic, as in cars in front of you are all suddenly not moving, and I don't mean directly in front of you but some distance away, meaning cruise control hits them with radar when they're doing 0-5mph.

If you rely on cruise control too much and get distracted...you're gonna have a 20mph hit give or take.

 

[037]

It was in an older version of the manual, probably for the '09 or '10 model (see attached). I don't know if they've changed the separation distances for '11 or '12.



Haven't tried that yet.

Basically, I agree that you have to be vigilant using the SCC, but it's much better than the single speed controls I've had before.

that's a good bit of info which seems to be missing from the newer manual. Thanks for sharing.

 

[BacktoHyundaibychoice]

my concern came from a real world scenario, which is why it was scary to me.

Here's the basic situation. You got cruise control at 70, 65 limit. There are no cars in front of you so you're going 70.

then you hit traffic, as in cars in front of you are all suddenly not moving, and I don't mean directly in front of you but some distance away, meaning cruise control hits them with radar when they're doing 0-5mph.

If you rely on cruise control too much and get distracted...you're gonna have a 20mph hit give or take.

If that's 'real world', are you saying you didn't see the stopped cars/brake lights until you had to slam on your brakes? How is that possible? And once again, SCC doesn't "hit them" if they're standing still. But that's moot: going 70 and seeing stopped cars "some distance away" means you don't rely on cruise control anyway.
Btw, do you have SCC?

 

[BacktoHyundaibychoice]

that's a good bit of info which seems to be missing from the newer manual. Thanks for sharing.

'09 didn't have SCC.