TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

Does the Traffic Aware Cruise Control wear on your brakes?

Discussion in 'Model S' started by erickulcyk, Apr 29, 2015.

  1. erickulcyk

    erickulcyk New Member

    Apr 29, 2015
    Redmond, Washington
    So I read somewhere that the TACC isn't the best about smoothly using your regenerative braking, but instead will use your actual brakes by decelerating too fast. Is this true? I'm waiting for mine to be delivered, but I'm not sure if I should use TACC sparingly or not.

  2. robby

    robby Member

    Aug 25, 2014
    Andover, MA
    It's improved a lot since its inception. In normal circumstances with the latest firmware, regen provides much more braking power than TACC requires; it rarely pushes past 60 kWh, let alone needs disc brakes. From an efficiency standpoint, you can do better by hand than what TACC does, but if you're not trying to hypermile, I doubt it'd make much difference.

    Hard/disc braking with TACC mostly occurs in situations where speed changes quickly. For instance, if you're in stop and go traffic, then it speeds up to 40 briefly, then stops again, TACC will accelerate hard and brake hard to react to traffic. A human might better see the larger context of the road, and allow more space to accumulate in front knowing things will slow down ahead and the gap will close.
  3. Ames

    Ames Member

    May 27, 2013
    Abu Dhabi, UAE
    The spaciousness of the Model S combined with the Autopilot feature certainly presents new opportunities for things to do while driving. I would imagine that while performing your breaks, head spins in particular would present a problem as it would likely result in the destruction of your rear view mirror and premature wear of the center console, and if the car suddenly engages emergency braking there's no telling what position you'd end up in.
    Welcome to the forum :)
  4. Chipper

    Chipper Active Member

    Sep 23, 2013
    Chattanooga, TN
    It has not affected my breaks at all. I take one whenever I feel like it. :tongue:

  5. electrish

    electrish I Sing the Body Electric

    Nov 8, 2014
    I use TACC a lot during my commute to and from work and have noticed that my rotors are rusty.
    So I assume that TACC doesn't overly use the breaks, but rather mostly relies on regen.
    But I agree that it sometimes is choppy and that one could probably do better hypermiling pedally.
  6. CHG-ON

    CHG-ON Still in love after all these miles

    Jun 24, 2014
    Santa Cruz Mountains, USA
    My car brakes much harder than I would without TACC and using regen. So I think it does use the brakes much more. Not so much on the highway. But certainly in my rural road driving while following cars.

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.