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  #13  
Old 05-16-2017, 09:36 PM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

If you haven't set this, try the speedo in digital/numerical display, instead of analog display. It is easier to notice a slight reduction in speed in the display.

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  #14  
Old 05-17-2017, 07:16 AM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

I have a question too regarding ACC. When ACC slows the Jeep do the brake lights come on? I have not anyone behind me watching to see. Curious if others know.

And I have to agree with Jim in PA's comment, ACC reduces the fatigue of highway travel. I spend a lot of time on the road and have noticed a significant difference using ACC.
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  #15  
Old 05-17-2017, 09:28 AM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

Yes, if the Jeep applies the brakes to slow down, the brake lights do come on.
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  #16  
Old 05-17-2017, 10:31 AM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

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Originally Posted by philbytx View Post
Jeez!

How can you not be "in tune" with your vehicle when driving?
Sorry guys, driving is a serious task that requires attention and focus. If you can't feel your vehicle slowing down or objects becoming nearer, perhaps you should stop texting and get your eyes back on the instruments/road!!!
If you ever get rear ended you'll be wishing the other guy had a system that intervenes. If everyone was as perfect as you when behind the wheel we wouldn't need seat belts or air bags.

Unfortunately most of us have human failings.

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Old 05-17-2017, 11:21 AM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

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Originally Posted by bill_de View Post
If you ever get rear ended you'll be wishing the other guy had a system that intervenes. If everyone was as perfect as you when behind the wheel we wouldn't need seat belts or air bags.

Unfortunately most of us have human failings.

--
yes, like not being an actively engaged driver
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  #18  
Old 05-17-2017, 12:46 PM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

Quote:
Originally Posted by philbytx View Post
If you can't feel your vehicle slowing down or objects becoming nearer, perhaps you should stop texting and get your eyes back on the instruments/road!!!
Meh. The common scenario for me is being locked onto the vehicle I am following for a long time (so, constant distance) and they gradually lower speed over 10+ minutes until we're going like 5 under. This is especially prevalent when latched onto a tractor trailer while driving on rolling hills where they constantly vary their speed... but eventually the running average speed on level terrain is rather slow.

Quote:
Originally Posted by f1anatic View Post
Your Jeep might even drop a gear to help you pass when you are on cruise control and engage your turn signal !
I actually dislike that "feature". Having it drop from 8th to 5th or 6th and *floor* it to pass, only to apply the brakes a few seconds later when it realizes that there is someone in the left lane who doesn't want to pass with utmost alacrity. The outcome is even predictable several seconds in advance as the Jeep charges toward the bumper of the car in front of it before the system decides to brake and burn off 10+ mph.

One can sometimes tame this behavior via paddle shifting into 8th gear to "lock" it (depends on the Jeep's firmware revisions). However, if the Jeep *really* wants to floor it while passing thanks to the turn signal use, then it might drop several gears even in paddle mode and then it won't automatically upshift back to 8th.

All too often the workaround is to disable ACC, signal the turn, get into the other lane, then reenable ACC. This will cause the Jeep to accelerate, but without the subsequent pointless braking after overly aggressive acceleration. Besides, I very rarely wish to "floor it" to pass... a 3-5 mph relative speed difference is sufficient on the interstate in most circumstances.
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Old 05-17-2017, 01:05 PM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

Quote:
Originally Posted by bill_de View Post
If you ever get rear ended you'll be wishing the other guy had a system that intervenes. If everyone was as perfect as you when behind the wheel we wouldn't need seat belts or air bags.

Unfortunately most of us have human failings.

--
Bill de, you obviously misunderstood/misread my post. I was not knocking the system, rather anyone that is using it that doesn't take the time to get to familiarize themselves with it and, hopefully, understand it.

We use the ACC very frequently, especially when towing our Travel Trailer. I also believe that too many alarms, bells and chimes could be (further?) distracting for some folks.

I've been driving for over 50 years and a pilot for over 40, so I do understand safety systems. Even when on an instrument approach, we do trust our instruments but still use our eyes whenever conditions allow and also "feel" the aircraft. If you can't feel your car slowing down (see OP) then YOU might be distracted or have a perception issue, right ?

Oh! And there really is no need to get "snarky"...
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  #20  
Old 05-17-2017, 01:44 PM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

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Originally Posted by DriverDave View Post
Yes, if the Jeep applies the brakes to slow down, the brake lights do come on.
But more often than not, my guess is that the vehicle slows down by not accelerating (in other words, just coasting) when the ACC is engaged. It doesn't take much to scrub off a few MPH at highway speeds.
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  #21  
Old 05-17-2017, 02:05 PM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

This is true, but without using cruise control at all, every car slows when you let off the gas...without brake lights coming on. Even though the car is speeding up and slowing down on its own with ACC, everything still behaves exactly the same as if you were controlling the pedals.
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Old 05-17-2017, 02:08 PM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

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Originally Posted by DriverDave View Post
This is true, but without using cruise control at all, every car slows when you let off the gas...without brake lights coming on. Even though the car is speeding up and slowing down on its own with ACC, everything still behaves exactly the same as if you were controlling the pedals.
Right, I'm agreeing with you. The brake lights should not come on just because the vehicle is slowing down on the highway...they should only come on if the vehicle is actually braking. I coast all the time to slow down on the highway and I very rarely even use the brake pedal at all. And my car is a manual transmission, so it tends to really drop speed upon coasting, so maybe that's just why I'm sort of conditioned to drive like that on the highway.
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Old 05-17-2017, 04:16 PM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

In traffic, the ACC does use the brakes to slow down and thusly the brake lights go on.

I have a Tuson Brake controller for our trailer and the screen of the Tuson Command module shows percentage of brake pressure being used by the Jeep.
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  #24  
Old 05-17-2017, 08:27 PM
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Re: Adaptive cruise control... is there an indicator that notifies driver when car sl

The ACC, to slow down, it sometimes brakes and it sometimes coasts, depending on conditions. If it brakes the brake lights come on, and if it coasts they do not.
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