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TACC HW1 Limit

Discussion in 'Model S' started by xnetco, Mar 12, 2017.

  1. xnetco

    xnetco Member

    Joined:
    Dec 31, 2016
    Messages:
    32
    Location:
    Hertford
    Hello guys,

    Is there a speed limit on TACC for HW1?
     
  2. BerTX

    BerTX Active Member

    Joined:
    May 2, 2014
    Messages:
    1,698
    Location:
    Texas/Washington
    There used to be an upper limit of 90 mph, but that was several firmware versions ago.
     
  3. Lee_B

    Lee_B Supporting Member

    Joined:
    Nov 22, 2016
    Messages:
    44
    Location:
    Springfield VA
    Mine is still 90mph
     
  4. RobertF

    RobertF Member

    Joined:
    Apr 21, 2016
    Messages:
    100
    Location:
    Huntington Beach, CA
    I have a 2014 S85 with auto pilot. In areas where speed limit drops, probably due to error ~50, TACC will reduce speed when set at 75 and the average speed of traffic is 75. Turn off TACC no reduction. Whats going on?
     
  5. BerTX

    BerTX Active Member

    Joined:
    May 2, 2014
    Messages:
    1,698
    Location:
    Texas/Washington
    I'm not clear on what is happening. The "Turn off TACC no reduction" comment is throwing me. If TACC is off, then you are driving and controlling the speed.

    I'm not aware of TACC (Traffic Aware Cruise Control) alone currently paying any attention to speed limits changing. So you say it resets when there is a dramatic change in speed limit? I guess I haven't seen or heard of that happening. You say it is an error, like misreading a sign or an error in the GPS database?

    AutoPilot (TACC plus AutoSteer), on an undivided road, will not currently allow you to go more than your speed offset amount (up to 5 mph over the speed limit) and will reduce your speed setting to the speed limit plus your speed offset (up to +5). If you stay on AP, once the speed limit rises back up, the speed setting will rise back up, but not to above what you had set before.
     
  6. boaterva

    boaterva Supporting Member

    Joined:
    Apr 2, 2016
    Messages:
    1,322
    Location:
    Northern Virginia, USA
    The manual I have shows 90 MPH, and I believe that's the target for HW2 (I know this originally was a HW1 question!).

    Warning: Traffic-Aware Cruise Control
    cancels, or may not be available, in the
    following situations:
    • You press the brake pedal.
    • Your driving speed drops below
    5 mph (8 km/h) in situations when
    Model X does not detect a vehicle
    ahead within the specified distance.
    • Your driving speed exceeds the
    maximum cruising speed of 90 mph
    (150 km/h).
    • You shift Model X out of Drive.
    • The driver's seat belt is unbuckled.
    • A door is opened
     

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