Winter is the real test here. Worked on lidar perception for a bit and falling snow throws returns everywhere, plus once the lane lines are under slush everyone just drives in the ruts the car ahead made. Curious how they handle those unofficial lanes.

As a driver in places where it snows... I'm curious about how it will handle:

1. Fresh unplowed snow where there are no lane markers visible.

2. Significant banks that take up half a lane with two lanes in each direction.

3. Ice (often one doesn't start going through an intersection on a green until you're 100% sure that every car has cleared - I've been on both sides of this, where you don't go because there's a car sliding through, and the car sliding through because slick ice doesn't care about brakes)

4. Hard braking (the "drive slow and use the brakes lightly for a long while")

5. Cold car things. Electric battery life in the cold (heater for the passengers). Wipers frozen to the windshield. Accumulation of snow on the window. Excess snow on top of the car (considered an insecure load).

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Tangent for the "how do you handle lanes when you can't see any" ... old school approach: https://ieeexplore.ieee.org/document/833362

> Driving a snowplow during whiteout condition is one such example. In order to improve the safety and efficiency of the snow removal operation, a supplemental steering guidance display was proposed and instrumented in a Caltrans snowplow. The guidance information was calculated based on the magnetic markers embedded under the roadway. Operations were successfully conducted on a 6.25 km freeway over Donner Summit on Interstate 80 in California during the 1998-1999 winter season.

https://ahmct.ucdavis.edu/advanced-snow-plow

When all an account posts is claims of first-hand experience with various unrelated technologies, the strategy becomes a bit too obvious: https://news.ycombinator.com/threads?id=hncbw02z5a&next=5009...

True. But don't most people drive in the tracks of the car ahead? I know when it snows people sometimes make a three-lane highway into a two-way "rut railway" road, and make do.

They've been doing test runs here in Minneapolis for more than a year. You're right that it's a challenge, but I bet they'll do fine after a couple years of refinement.

I worked on perception systems five years ago and we had de-noising algorithms that are much better now. We would never have dared to drive in obscured lanes, but I assume Waymo’s high resolution maps and sensor fusion are extremely good, but yeah, are the vehicles going to plow through the unofficial lanes?

I have zero idea about lidar operational capabilities, but can you heat them to stop snow and ice from piling up?

that's in the FAQ. They say they have sensor cleaning tech. But they aren't launching until 2028 so 2 winters of testing should tell.

They linked to https://waymo.com/blog/2025/10/creating-an-all-weather-drive... discussing the snow mitigations all the way from software down to the built-in heaters on the sensors.

That's one of the reasons lidar will prove to be a dead end for this application. It's a temporary enabling technology on the path to the simpler multiple camera based solution.