1. Attachments are working again! Check out this thread for more details and to report any other bugs.

emergency braking alert????

Discussion in 'Prime Main Forum (2017-2022)' started by nbecker, Jan 19, 2018.

  1. nbecker

    nbecker Junior Member

    Joined:
    Apr 5, 2009
    10
    0
    0
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    Driving to work in my prime premium, turned off the highway onto the ramp to merge onto the secondary road. I'm looking left to merge into the traffic, then when I look back ahead of me, I see the idiot in front of me had STOPPED DEAD IN THE ROAD. I'm going about 50+ mph, about 100-200ft behind him/her. Applying full braking, I luckily managed to steer around and luckily nothing was there in the road to my left.

    I doubt I could have safely stopped without hitting him/her.

    So this whole time, the emergency braking /alert did absolutely nothing. What's the deal?
     
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,132
    50,047
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    was it on?
     
  3. nbecker

    nbecker Junior Member

    Joined:
    Apr 5, 2009
    10
    0
    0
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    I didn't know I could turn it off. How can I tell?
     
  4. SteveMucc

    SteveMucc Active Member

    Joined:
    Oct 3, 2017
    391
    268
    0
    Location:
    Kentucky
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    if you have you're foot hard on the accelerator it won't engage.. it assumes you're in the process of taking evasive maneuvers so it won't cut power and potentially put you in a bad spot. likewise if you turn hard, etc. it also won't engage.

    that's a catch 22... you're accelerating hard to merge and an idiot stops. that's the main dead zone in the system operation.
     
  5. nbecker

    nbecker Junior Member

    Joined:
    Apr 5, 2009
    10
    0
    0
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    I think I was just coasting while looking to the left, and I think I should have expected an alert
     
  6. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,132
    50,047
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    idk if it can be turned on/off, just a thought.
     
  7. huskers

    huskers Senior Member

    Joined:
    Aug 21, 2005
    2,544
    2,486
    0
    Location:
    Nebraska
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    What color was the car you would have hit?
     
  8. MikailSJ

    MikailSJ Member

    Joined:
    Aug 25, 2017
    35
    27
    0
    Location:
    USA
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    I don't think the alert goes off 100-200 ft out.
     
  9. Ferrarilover

    Ferrarilover Active Member

    Joined:
    Mar 1, 2016
    185
    168
    0
    Location:
    Manchester, UK
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    In the UK it only works below 30 or 40 mph. It isn’t all speed. If cruise was engaged then that might have braked.


    iPhone ?
     
  10. ct89

    ct89 Active Member

    Joined:
    Dec 31, 2010
    323
    266
    1
    Location:
    New England
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    On my highlander (and I'm sure I've seen the same on the prime) even if you are accelerating, the display will flash a bright BRAKE.
    It doesn't take any action but it still flashes and beeps. It's pretty easy to activate. If you are speeding-up to pass someone in front of you and are late (according to it and my wife) fully moving over to the left lane, bingo...You get scolded...

    Check the owners manual...
    Page 369 starts a whole description of how to enable/disable and when the system might not activate.
    For almost all the cases, even if it doesn't activate, it should flash the BRAKE warning.
     
  11. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    17,557
    10,324
    90
    Location:
    Western Washington
    Vehicle:
    Other Hybrid
    Model:
    N/A
    At 50 mph, it should be able stop in 90-ish feet, unless the tires are worn or the road conditions are compromised precipitation.
     
  12. Lee Jay

    Lee Jay Senior Member

    Joined:
    Jun 25, 2009
    5,850
    4,028
    0
    Location:
    Westminster, Colorado
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    I wish people would RTFM.

    Page 373.

    upload_2018-1-21_11-33-41.png
     
  13. VTBIGDOG

    VTBIGDOG Active Member

    Joined:
    Dec 21, 2016
    211
    146
    0
    Location:
    USA
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    If people would RTFM, that would eliminate 1\2 of the topics. If we then removed all of the Facebook-type posts, we would have a manageable and informative database. Why would we want to do that?
     
    ct89 and Tideland Prius like this.
  14. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,132
    50,047
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
  15. I'mJp

    I'mJp Senior Member

    Joined:
    Mar 12, 2012
    628
    552
    0
    Location:
    Ma, USA
    Vehicle:
    Other Electric Vehicle
    Model:
    Three
    Reading the manual is like asking for directions. Ain't gonna happen.
     
    sonomac likes this.
  16. geguia

    geguia Active Member

    Joined:
    Dec 21, 2016
    209
    108
    0
    Location:
    los angeles
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    you must be fun at parties.
     
  17. Lee Jay

    Lee Jay Senior Member

    Joined:
    Jun 25, 2009
    5,850
    4,028
    0
    Location:
    Westminster, Colorado
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    No one is fun at parties.