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Lane Keeping Assist

Roger B

We have just replaced our 15 year old VW Touran diesel with a T-Cross 1.0 TSi. This is, as all new cars, fitted with lane keeping assist. I was wondering what would happen if it got confused? Could I, or my wife, fight it and win. Looking at the Bosch variant it either uses the electric power steering, if fitted, or brakes individual wheels using the ESP.

https://www.bosch-mobility.com/en/solutions/assistance-systems/lane-keeping-assist/

“Lane keeping assist uses a video camera to detect the lane markings ahead of the vehicle and to monitor the vehicle's position in its lane. If the vehicle’s distance to the lane markings falls below a defined minimum, the system steps in. In vehicles with electric power steering, it gently, but noticeably countersteers in order to keep the vehicle in the lane. In vehicles without electric power steering, it achieves the same effect by utilizing the electronic stability program (ESP®) to brake individual wheels.

Drivers can override the function at all times, so they retain control of the vehicle. If they activate the turn signal in order to intentionally change lanes or turn, the system does not intervene.”

I am fairly happy with these various assist systems so long as the appropriate risk assessment and performance level calculations have been carried out, so not designed like the Boing anti stall system.

 

Some while ago I started a thread on EVs apparently becoming immobilised due to battery or other failures.

https://engx.theiet.org/f/discussions/28694/evs-immobilised-by-flat-batteries-or-breakdowns

The new car has a DSG transmission and the selector lever is locked in Park when the ignition is switched off. It requires 12V to be available to release it, so flat battery and the car is immobilized. Reading deeply in the handbook it can be released with a screwdriver (supplied with the car but buried under the spare wheel) by opening a flap in front of the (conventional) hand brake lever. Who, other than an Aspergers spectrum engineer, would actually look that up?

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  • I don't like the idea of the lane keeping assist trying to steer. My other half's car has lane departure warning system (just flashes a light and buzzes but doesn't try to do anything else) but it's got it wrong plenty of times - often on motorway roadworks with a mix of original and temporary lane markings partly visible, especially when wet; on narrow winding roads it doesn't seem to fully understand that the position the car is in isn't entirely the same as the view from the front facing camera, and as for situations where driving deliberately close to the edge to allow space for a wide oncoming vehicle, it could be disastrous if it tweaked the steering to the right even for a moment.

    And don't get me going about the automatic sign reading ... the number of times it's missed signs completely ,or even funnier, reported a 30 sign as 80...

       - Andy.

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  • I don't like the idea of the lane keeping assist trying to steer. My other half's car has lane departure warning system (just flashes a light and buzzes but doesn't try to do anything else) but it's got it wrong plenty of times - often on motorway roadworks with a mix of original and temporary lane markings partly visible, especially when wet; on narrow winding roads it doesn't seem to fully understand that the position the car is in isn't entirely the same as the view from the front facing camera, and as for situations where driving deliberately close to the edge to allow space for a wide oncoming vehicle, it could be disastrous if it tweaked the steering to the right even for a moment.

    And don't get me going about the automatic sign reading ... the number of times it's missed signs completely ,or even funnier, reported a 30 sign as 80...

       - Andy.

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