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

AP v8.0 Review: Driving in Heavy Rain

Discussion in 'Model S: Driving Dynamics' started by suraj1194, Oct 27, 2016.

  1. suraj1194

    suraj1194 Member

    Joined:
    Jul 19, 2016
    Messages:
    196
    Location:
    Bay Area CA
    Got home a while ago after a 2hr drive through continuous heavy rain here in the bay area. Speeds ranged from near standstill to 70ish. Visibility ranged from decent to poor (couldn't see 3-4 carlengths ahead) . I drove with AP enabled as much as it would stay on. Except for a 10 minute period through driving rain when it disengaged and would not turn back on, it worked very well. During the period where Autosteer would not work, TACC still worked fine. There were two instances where the AP 'lost' the lane marker dots (the lanes themselves were barely visible in the nighttime rain) and wandered into the adjacent lane. I let it wander while keeping track of the next lane, before bringing it back into my lane. Acceleration and deceleration were not jerky. I kept the spacing in front at 4 throughout, which was plenty. Overall, my experience follows this article: Tesla Autopilot Performs Surprisingly Well in Heavy Rain
     
    • Informative x 4
  2. Max*

    Max* Autopilot != Autonomous

    Joined:
    Apr 8, 2015
    Messages:
    6,024
    Location:
    NoVa
    Sounds similar to the performance of AP on 7.1 in heavy rain. Cool.
     
  3. suraj1194

    suraj1194 Member

    Joined:
    Jul 19, 2016
    Messages:
    196
    Location:
    Bay Area CA
    I have not driven with AP v7.x in such heavy rain, but with what the car has in v8.0 today, I'd happily use it in such conditions. It's more effective than I thought it would be, able to accurately track the lane and cars around in heavy rainfall conditions where I had to focus to see everything around myself.
     
  4. bmah

    bmah Obscure Member

    Joined:
    Mar 17, 2015
    Messages:
    1,088
    Location:
    Lafayette, CA
    Same weather system...

    I did a drive in moderate rain from the SF Bay Area to Fresno this morning. The rain stopped somewhere around the I-5 / CA-152 interchange (which is just south of the under-construction Santa Nella Supercharger), and I had AP engaged almost the entire time. So I got a fair bit of experience with AP 8.0 in rain. In general I was impressed at how well it tracked the lanes and stayed centered, even in curves. There is one curve in particular (eastbound I-580, Altamont Pass, going under UPRR tracks) where I always had to take over steering on 7.1 and earlier, but 8.0 was rock solid.

    There were a few places where I disengaged autosteer to maneuver around traffic, and it didn't have enough confidence in the lane markings to allow me to reengage immediately. But once I did get autosteer engaged, it stayed on, even with the slightly limited visibility. TACC (on a setting of 3 or 4) was smooth throughout, as I have experienced in better weather.

    One stretch of road (I-580 southbound, just south of the I-205 split) is currently under construction...there are stripes between the two southbound lanes, but no lines for the shoulders (there are, however, traffic cones). I was actually amazed at how well it was able to do with only one set of striping to work with...it even displayed the road edge on the IC (no lane markings). I am not sure how it figured out where the road edge was.

    Bruce.
     
    • Like x 2
    • Informative x 1
  5. suraj1194

    suraj1194 Member

    Joined:
    Jul 19, 2016
    Messages:
    196
    Location:
    Bay Area CA
    Drove through torrential rain again yesterday evening on the I80 . I'm currently on V8.0 2.50.114 (AP V1 hardware) . It worked great, and this time I did not have a single instance of AP refusing to re-engage despite visibility being quite poor amidst heavy winds and sheets of rain. Further, the car never lost the lane markers at any time, even though on multiple occasions it 'hunted' to stay within the middle of the lane, drifting left and then right but ultimately centering. This was the case soon after negotiating curves, when I assume the computer vision system tried to keep tracking the change in curvature and then straight road, correctly in low visibility.

    This is a noticeable improvement over my last experience with AP in rain back in October. I also noticed that acceleration after slowing down for a car in front is more gradual now. I noticed this when the car in front switched lanes, giving me clear passage, but it didn't accelerate like a jackrabbit as it once used to, either on dry pavement or in the rain.

    Overall, I'm pleased to note the continuous improvement in the system under critical usage conditions, even though as AP2 is rolled out, AP1 would supposedly receive less attention. It's the coolest thing about this car - something you bought that keeps continuously evolving.
     
    • Informative x 2
    • Like x 1
  6. malcolm

    malcolm Active Member

    Joined:
    Nov 12, 2006
    Messages:
    2,460
    Thanks for the update.
     

Share This Page