LDA (Lane Departure Alert)

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by bowerda47, May 13, 2016.

  1. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    42,769
    14,258
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    The 2021 has TSS-P 2.0. Not sure if the hardware is different but it includes Lane Trace Assist which is closer to the old Toyota LKA than the much simpler LDA w/ Steering Assist in TSS-P 1.0.
     
  2. pakitt

    pakitt Senior Member

    Joined:
    Aug 10, 2009
    1,993
    1,205
    0
    Location:
    Colorado
    Vehicle:
    2021 Prius Prime
    Model:
    Limited
    On a side note: I find the TSS2.0 LKA/LTA with active steering annoying. The steering wheel "wiggles" instead of keeping straight in the middle and not following "exactly" what the lane markings are. I end up turning it off... I drove a Mazda rental a few months ago and it was a pleasure. The one from Toyota, an annoyance.
     
  3. Colorado Boo

    Colorado Boo Member

    Joined:
    Jun 23, 2021
    283
    161
    8
    Location:
    Monument, Colorado USA
    Vehicle:
    2021 Prius
    Model:
    LE AWD-e
    My LDA put a message on the display, "Please stop in 400 feet let me out, you maniac!"

    Seriously, though, mine also seems to work better when driving over 45 mph and I can notice no difference between the sensitivities. At lower speeds, it does tend to do "military driving" (Left-Right-Left-Right).

    The most unnerving thing it does is on 2-lane roads and I have oncoming traffic and just before meeting the oncoming vehicle it tries steering to the left....HEY STOP THAT!

    Looking at the screen, I don't think it's just looking at paint because I have some places (new road) where they haven't painted the right side, yet, but it still sees something and puts it on the screen.

    Another strange behavior is it does alert me when I don't have both hands on the wheel but only sometimes...not even sure how it can know that.

    I've read that future versions will also have the same technology the military uses with the eye detection. When a military pilot passes out (usually due to over-G's) the system detects the eyes not looking and will sound a LOUD alarm to wake them up before they crash. I've read Toyota is working on using this to alarm drivers who are not looking out their windshield. (Fell asleep, passed out, looking down at their stupid cell phone, etc.) This is a great idea. I've seen numerous drivers who drift because of looking at their cell phones and hitting the curb or running off the right edge of the road. (Numerous times!)
     
  4. pakitt

    pakitt Senior Member

    Joined:
    Aug 10, 2009
    1,993
    1,205
    0
    Location:
    Colorado
    Vehicle:
    2021 Prius Prime
    Model:
    Limited
    Systems that check the driver alertness have been in research for over a decade in the automotive industry. The biggest limiting factors being cost and processing power. As well as affordable image sensors that can see in widely varying light conditions (i.e., HDR sensors).
    That Toyota will be bringing them in TSS 3.0 is not a surprise and welcome change. But if it works annoyingly like LKA with Active steering, I hope one can turn it off...
    As for the steering wheel alert, you can easily detect whether you are touching or not by checking position sensor and the torque sensor on the steering wheel column. If the car notices that all changes on the steering wheel position are coming from its own doing (active steering), it means your hands are off and sends an alert.
    Checking whether your eyes are on the road, requires eyes and face tracking (and enough affordable processing power to do it.)
     
    Colorado Boo likes this.
  5. Colorado Boo

    Colorado Boo Member

    Joined:
    Jun 23, 2021
    283
    161
    8
    Location:
    Monument, Colorado USA
    Vehicle:
    2021 Prius
    Model:
    LE AWD-e
  6. pakitt

    pakitt Senior Member

    Joined:
    Aug 10, 2009
    1,993
    1,205
    0
    Location:
    Colorado
    Vehicle:
    2021 Prius Prime
    Model:
    Limited
    I think many Tesla drivers are overconfident that the car will drive itself. They spent so much money on it, they won't read the instructions and disclaimers of what the "Autopilot" can, or cannot, do. And then they don't listen to the alert the car gives them. And then bad things happen.
    It is a combination of an over-ambitious company (and their CEO), and over-confident drivers who think they just bought a fully self driving car (it is not!).

    @Colorado Boo : I see you have a Prius with AWD-e; how does that work for you? did it help this past winter? And did you have a front-wheel drive car before getting this Prius?
     
  7. Colorado Boo

    Colorado Boo Member

    Joined:
    Jun 23, 2021
    283
    161
    8
    Location:
    Monument, Colorado USA
    Vehicle:
    2021 Prius
    Model:
    LE AWD-e
    I've only had the AWD since July so haven't had a chance to give her the snow/ice test yet. My wife has a 2017 Prius LE and it's been pretty good in the winter here. She just has all-season tires and we take our 4X4 Tundra around in the storms.
     
Loading...