I believe the "advanced" LKAS on Rivian only works on highways and relies on an "up to date" geofencing database, so that's the first-order technical reason. And I'm sure they don't exactly prioritize fixing or altering that behavior for the other reason.

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mingus88 3 hours ago | parent | next [-]

This is a safety issue. I don’t think there is a “fix” for offline lane assistance that they are sitting on do avoid people from disabling telemetry

The gen 1 system uses cameras primarily. It’s not awesome lidar or AI. It needs up to date road information.

I’ve been driving down I-5, a major interstate and had it turn off on me, presumably because I hit a dead spot, as conditions were fine and I5 is one of the most popular routes there is.

I’m fine with all of this. I prefer that it hand back control to me rather than make me another statistic like Tesla’s system.

	▲	bri3d 3 hours ago \| parent [-]
		Sure; I think that's a reasonable take too. I have no idea what their TTL requirements are or how frequently they update the ADAS database; if they're on the order of real-time, this seems like a complete technical constraint, if they're on a longer time horizon they might be able to offer manual offline databases. I'm very curious at what level the restrictions operate. With every other manufacturer I've looked at, they're extremely coarse-grained; it's more like "is there a known long-time-horizon hazard in this area that is known to impair the system" than a "we mapped every lane and you need a database." I wonder if your I5 issue was a weeks or months-old construction area, for example. I haven't looked at Rivian much, though, and it could be totally different or extremely fine grained, there's no reason to suggest otherwise either.

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thescriptkiddie 3 hours ago | parent | prev [-]

how would that even work? even if you could generate accurate maps of lane markings, non-differential gps in not accurate enough

	▲	bri3d 3 hours ago \| parent [-]
		I think it's a coarse-grained "this highway has been deemed non-anomalous enough to allow the vision systems to engage," not a fine-grained "we mapped every lane marking."