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Car forgot speed limit on local freeway

Discussion in 'Model S' started by brec, Sep 10, 2016.

  1. brec

    brec Member

    Aug 3, 2015
    Las Vegas, NV
    Until a few days ago, my MS seemed to know that the speed limit on a local freeway was 65 without having to read a speed limit sign. While still on an on-ramp, the TACC default would become 76 -- I have the Speed Assist set to relative +11 (10 over + 1 for speedometer error adjustment). I don't specifically recall whether the speed limit showed as 65, but I'm sure about the TACC default.

    Now, on the on-ramp and on the freeway until a speed limit sign is seen, the TACC default and the speed limit remain blank, and engaging TACC causes it to set to whatever speed I'm currently driving.

    It's only a minor inconvenience, but I'm curious as to what may have changed. The car's been running 2.28.19 for almost two months.
  2. green1

    green1 Active Member

    Mar 25, 2014
    Calgary, Alberta, Canada
    Autopilot downloads "tiles" independent of full map updates or firmware revisions. It's possible it got new data on one of those that caused the change.

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