Comment by bluGill

I don't get it.

I can see how precision GPS is not required for safety, and how it is not sufficient for safety, but can you elaborate on why reducing noise in this signal is not even useful?

The social norm that we seem to be slowly stumbling into assumes a different state of affairs:

That the roadways ought to always be clear of anything but cars which are behaving normally, and that if you can keep a car in the lane then anything unusual which happens isn't the car driver's fault.

Debris, animals, children, pedestrians, cyclists, motorcycles, stopped cars, construction workers and their vehicles, and anything else in our complex world that may find its way into the road - these aren't visible to someone blinded by oncoming headlights at night, they don't register in the same way as a car in the peripheral vision of someone looking at their cell phone or touchscreen controls, they may not be detected by radar cruise sensors or lane centering cameras, they certainly won't register on a GPS navigation track...and in a collision, society increasingly blames the thing that wasn't ~~supposed to be there~~ *anticipated* to be there rather than the driver which crashed into the thing.

I recognize that the likely cause of this is simply the infrequency of those events. Spend a few thousand miles seeing little other than cars on the road, and it's easier for your brain to assume that cars are the only thing that can be on the road. But my skeptical, cynical, conspiracy-minded side wonders if some of this trend is encouraged by submarine marketing efforts from self-driving vendors - the problem gets a lot easier when your "autonomous" vehicle isn't at fault for hitting a pedestrian in the road and you can just follow a GPS track while sensing for 5000 lbs steel boxes following the same GPS track.

If/when QPS is realized, calibration to a fixed point via manual verification, fixed base station(s), and/or multiple GNSS systems then GNSS spoofing, accuracy, and precision won't matter all that much because it will be entirely self-contained.

It's absurd overkill to put GNSS transmitters, RFID tags, and/or Bluetooth beacons on every object because the world is being flooded, for better or worse, with AI visual and IR cameras.

> Prevision GPS is useful for a lot of things, but it isn't needed for car navigation. If you know within 100 meters of where you are you can figure out the exact lane you are in by other clues - clues that you need to look for anyway because road/utility crews will sometimes direct you to do things that are not on your updated maps.

Except it is because driving direction routing depends on determination is based upon knowing which of several parallel, different roads one is on like the difference between being on a highway and on a parallel frontage road. Incorrect road detection leads to offering wrong directions.