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Dynamic cruise control "waiting" status

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by annexedwa, Mar 17, 2016.

  1. annexedwa

    annexedwa Junior Member

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    so I noticed when in dynamic cruise control if I'm following a vehicle and it stops at a light my car will stop behind it at the selected distance. However, it goes into a waiting mode which is displayed on the bottom of the radar screen. What is this mode and how do you most efficiently resume dynamic cruise control? I found that if I press the gas momentarily it resumes but very very slowly since it is maintaining a set distance. This obviously annoys the crap out of drivers behind me. Is there a way to have it resume quicker? The obvious advantage would be less fatigue during traffic conditions. Oh and here is a picture of my hypersonic red four touring

    Are the brake lights activated every single time the Vehicle decelerates? One would think this would really annoy drivers behind you. I understand a significant deceleration of 5+ miles an hour, but what about 1-2 mile an hour adjustments?
     

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  2. mkutner

    mkutner Junior Member

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    You can push up on the cruise control lever to resume following from full stop. I'm not sure if the result is quicker acceleration than pushing on the gas pedal.
     
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  3. cycledrum

    cycledrum PSOCSOASP

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    Just watched a Toyota demo video and yes, the guy recommended using the cruise stalk, push up to resume from a stop.

    Just curious, for all who have full speed DRCC, are you using it on freeway in stop and go, gridlock, the bad stuff traffic, and if so, how is it working for you??

    I was thinking of posting a thread on Prius full speed CC in gridlock, but let's see how it goes.
     
  4. WilDavis

    WilDavis Senior Member

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    If the drivers behind are getting annoyed, that just means they're most probably following way too close! When I was learning to pass my test (in the UK, back in 1968) we were taught to leave a minimum of a car's length for each 10 mph of speed, and double that in inclement conditions! (…remember at 60 mph, you're covering 88 ft per second!
     
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  5. I'mJp

    I'mJp Senior Member

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    For me it was the reason to buy the car. I use it everywhere.
    I think that its great, especially for the 20 mph zones.
    An inconsistency I've noticed is when the car in front makes a turn, the system dis-engages it's self, so,
    first you have to keep speed with the accelerator, and a resume brings it back.

    It also got fooled once, when a single lane rood split into 3 lanes with no lane lines for 20 or 30 feet, followed by lanes with lines.
    The car that I was following turned to the leftmost lane.
    All three lanes had cars in them waiting for a red light, an my car started an acceleration, which I killed with a tap on the brakes.
     
    #5 I'mJp, Mar 17, 2016
    Last edited: Mar 19, 2016
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  6. pakitt

    pakitt Senior Member

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    My question is, how reliable it is? how many "surprises" will it generate due to false positives and negatives? can I sit and relax assuming it will do its job, like a regular cruise control does, or do I need to always keep more than 1 eye open and a foot ready for the situations in which it will not do what it should because the sensors got fooled by something that seems normal instead to the driver?
     
  7. Kenrico

    Kenrico Member

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    It is the bomb !

    I drove a 2012 Plug In Advanced back from San Francisco to San Diego last week and used it almost the entire 500 miles .

    Had to be careful jumping back in to the the 07 Prius with normal cruise , gotta brake or plow into the car ahead.

    Kenny
     
  8. WilDavis

    WilDavis Senior Member

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    Mmmm! Well, I've never ever had that problem! (…see my previous post!) :rolleyes: ;)
     
  9. Tideland Prius

    Tideland Prius Moderator of the North
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    Haven't had much chance but would shortening the set distance help? Say using 1 or 2 bars instead of 3 bars. You can use the CC "resume" function to start acceleration. Just push up on the stalk.

    How is it different from the Gen 3's DRCC? In the Gen 3, it will accelerate around a corner if it loses track of the car in front. In the Gen 4, it'll cancel itself, so there's an improvement there.

    I'd say, "sit and relax" but still pay attention to your surroundings and anticipate unexpected situations. I mean, a computer doesn't have the same cognizant capabilities as you.
     
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  10. mkutner

    mkutner Junior Member

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    I usually use two bars. My experience has been really good on the freeway at moderate to high speeds - maybe 35 to 65+ miles/hour. The car naturally adjusts to the pace of the car in front, and handles well cars changing into my lane. I never use it in the right-hand lane, because the DRCC can't anticipate cars merging onto the freeway. The experience in stop-and-go traffic is a little iffy. If the neighboring lanes are stopped but my lane is clear, the car zooms down my lane much faster than is prudent. Because the DRCC can't see in front of the preceding car, it can't anticipate slowing traffic - so it winds up accelerating into a slow-down and then braking - instead of just coasting.
     
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