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this post was submitted on 17 Sep 2023
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Stupid article. Lidar can't see lines painted on the road. Using lidar wouldn't have any impact on the described problem.
The described problem wasn't that the car didn't see the lines, it was the car steering into oncoming traffic when it couldn't see the lines. Lidar could potentially very well help with that, by giving the car a better model of the surroundings letting it better reconstruct the intended road path even when the lines are faded, and also see oncoming traffic better and avoid it.
Exactly this. Also I wanted to point out, LIDAR absolutely sees the lines on the road. Of course, this is not much use if they're faded, but LIDAR receives points from the road/ground, and since lane markings are white, they have a much higher reflectivity. So if you look at a LiDAR pointcloud, the lane markings have a higher point concentration and you can definitely see them.
Source: I work in this sector.
LiDARs can absolutely detect painted lines and other painted symboles on the road. LiDAR is an active sensor technology that emits a LASER light beam and measurs the reflected echo, using the time delay between emittion and reception (time of flight) to measure distance. The painted lines will reflect the LASER with more intensity than the asphalt and the LiDAR sensor has the ability to measure that as well.
The successful autonomous vehicle deployments all use LiDAR and hd maps and cameras. Tesla is way behind at this point.