[maxgashkov]

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

[microtonal]

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.