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  #49  
Old 01-27-2016, 01:32 PM
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Re: turned off Forward Collision Avoidance today

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Originally Posted by jeepgrady View Post
Seems to me that in a situation like what you described, why wouldn't you just leave it off instead of constantly changing the set speed. I would prefer to concentrate more on what's going on ahead of me and reacting accordingly, as opposed to fiddling with the ACC. I never did nor will I use cruise unless their is a fairly open road ahead.
It's not a lot of adjusting. In normal stop and go it does its job very well without any Set speed change. It's only when there are sharp changes in speed, and only if bothered by the Jeep trying quickly to reach a Set speed that is much higher than current speed. It's not much effort or distraction to thumb a steering wheel button.

I never use cruise control, but love and use ACC. It is especially well suited to stop and go traffic. Don't have to worry about rear ending someone.

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  #50  
Old 01-27-2016, 04:31 PM
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Re: turned off Forward Collision Avoidance today

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Originally Posted by perpster View Post
Agreed. One workaround for the ACC acceleration comment:

I've noticed ACC will accelerate hard if there's a big gap between current speed and the ACC Set speed, but not accelerate hard if the gap is small. So for instance in variable traffic congestion on the highway, if I see that although I can go 50 mph right now, but there is a slowdown ahead, I change the Set speed to a lower number. Example: ACC set for 55 mph. Stop and go traffic opens up from 15 mph. ACC guns it to get to 55. But I can see another slowdown quarter mile ahead. So I thumb the ACC Set speed down to, let's say, 35 mph. Now, ACC gently speeds up to 35, and usually gently slows down when we get to the slowdown ahead.

In a sense it comes down to that ACC sees the one car ahead, but the driver can see much further ahead, and past the one car ahead. We can anticipate what the ACC can't see. ACC has radar, but not x-ray vision.

Honestly, that's what the ACC is supposed to do, I shouldn't have to babysit the car. If I wanted to regulate my speed that much, I'd just use the gas pedal haha. But yes, I'm talking situations where I'm cruising at 75 and come up behind some A-hole doing 55. When he gets over, the ACC wants to put me back and 75 immediately and dropping 3 gears and flooring it is just stupid.

Plus, in that scenario, the ACC control buttons suuuuuck. Like many other buttons in the jeep, you have to press them really hard to get the response you want. Sometimes I'll press the speed up button multiple times and it'll register one or two presses. Drives me nuts.

Best CC system I ever used was in a BMW. A little stalk under the turn signal that you would press forward or back to speed up or slow down. Small push to go up 1 mph, big push to go 5 mph, hold down to constantly accelerate. Great system, very intuitive, just wasn't ACC.
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  #51  
Old 01-27-2016, 08:51 PM
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Re: turned off Forward Collision Avoidance today

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Originally Posted by dcorn View Post
Honestly, that's what the ACC is supposed to do, I shouldn't have to babysit the car. If I wanted to regulate my speed that much, I'd just use the gas pedal haha. But yes, I'm talking situations where I'm cruising at 75 and come up behind some A-hole doing 55. When he gets over, the ACC wants to put me back and 75 immediately and dropping 3 gears and flooring it is just stupid.

Plus, in that scenario, the ACC control buttons suuuuuck. Like many other buttons in the jeep, you have to press them really hard to get the response you want. Sometimes I'll press the speed up button multiple times and it'll register one or two presses. Drives me nuts.

Best CC system I ever used was in a BMW. A little stalk under the turn signal that you would press forward or back to speed up or slow down. Small push to go up 1 mph, big push to go 5 mph, hold down to constantly accelerate. Great system, very intuitive, just wasn't ACC.
Agree on the aggressive speed-ups.

BTW, a sustained press on the Jeep's button moves the speed setting in 5 mph increments. Short presses do 1 mph increments.
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  #52  
Old 01-28-2016, 12:16 AM
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Re: turned off Forward Collision Avoidance today

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Originally Posted by dcorn View Post
...Plus, in that scenario, the ACC control buttons suuuuuck. Like many other buttons in the jeep, you have to press them really hard to get the response you want. Sometimes I'll press the speed up button multiple times and it'll register one or two presses. Drives me nuts.

Best CC system I ever used was in a BMW. A little stalk under the turn signal that you would press forward or back to speed up or slow down. Small push to go up 1 mph, big push to go 5 mph, hold down to constantly accelerate. Great system, very intuitive, just wasn't ACC.
I've never had any problem pressing any of the buttons associated with the ACC system. They don't require pressing any harder then what seems normal, nor do they require multiple presses to get the system to register and/or respond.
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Old 01-31-2016, 01:41 PM
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Re: turned off Forward Collision Avoidance today

Wow...good discussion. Sorry I have been really sick and haven't been reading much so I just caught up.

I did so some searching and see many cars makers have been having issues with auto-braking glitches, as well as the auto driving cars. Makes me wonder about the wisdom of the big push to include it in all new models. Just go search google about federal probes.

The big issue besides startling the driver is that if I were to leave on auto-braking and for some reason it engages without cause on a busy freeway I may not dead stop because it can only apply 50% braking but I may be slowed significantly enough to make it a dangerous situation. (yes I know, don't drive at 80....speed limits on highways in Utah and Texas can be 85. Even in CA that is a normal speed of traffic in some areas. In which case, you will get run over going much slower). This is why there is a probe.

I do agree with the conversation on the mass acceleration with the ACC system. it can be a bit unnerving but it does stand to reason that if the situation warrants you should disable the system or adjust it as required. Generally if the traffic becomes overly or weirdly congested to where I have to change it like that I just turn it off until traffic gets back to normal.
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  #54  
Old 02-03-2016, 09:54 AM
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Re: turned off Forward Collision Avoidance today

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Originally Posted by dcorn View Post
Honestly, that's what the ACC is supposed to do, I shouldn't have to babysit the car. If I wanted to regulate my speed that much, I'd just use the gas pedal haha. But yes, I'm talking situations where I'm cruising at 75 and come up behind some A-hole doing 55. When he gets over, the ACC wants to put me back and 75 immediately and dropping 3 gears and flooring it is just stupid.
That's exactly the reason I run in manual shift mode on the interstate. It locks it into the cruising gear I want and will only downshift where it absolutely has to. That means, if I slow down to 40 from 75 and want to go back to 75, it won't ever go below 5th or 6th gear. When it starts to speed up, I'll tap it up the necessary gears, which controls the acceleration.

It also helps tame the transmission on hills, too, though I usually have to manually tap it down a gear or two on bigger hills because it loses too much speed in 7th and 8th gear on the bigger ones.

One bonus: by having to occasional interact with the transmission, it's actually a great way to stay engaged and awake on long, boring trips when driving alone.

As far as Forward Collision Avoidance, I would never use it. I tend to leave plenty of space ahead, I plan avoidance maneuvers I might need when I'm passing or being passed in case someone cuts in on me and I always am prepared to hit the brakes when heading through intersections in case someone runs the light or hangs a turn in front of me.

As far as right or left turners ahead, I tend to let the gap open up even more if they happen to signal before their turn so a) I can avoid excess braking and b) avoid having to slow down as much for them to turn. Not only does that leave me less open to collision, but it reduces wear on the brakes and fuel usage.

As someone who rides a motorcycle, I've become accustomed to driving defensively. I'd rather arrive at all than arrive first.

BTW: quick tip. If you're approaching someone looking to turn right into your lane ahead and you aren't sure if they're going to wait or not, look at their wheels, not the person. They may be looking right at you and still pull out. The wheels are very easy to see signals they are starting off (assuming the guy doesn't have spinners on them, of course ).
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