I've never had a point where it is dangerous. It vibrates the steering wheel and that's it. Even on the autobahn's 2.20m wide roadwork left lanes it works good/not bad enough I just leave it on. Lane keeping is not mandatory, only a warning system.

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maxgashkov 38 minutes ago | parent [-]

I guess it depends on the maker. For my car it nudges the wheel back into the lane in addition to vibrating.

	▲	microtonal 19 minutes ago \| parent [-]
		Yep, it does, our VW also nudges back to the lane. The annoying thing is that you can only disable it by stepping through two pages on the on-board screen, though I think many newer models just have a button on the steering wheel to toggle it.