| 摘要 |
Proximity of a moving vehicle with respect to a lane boundary is ascertained and the degree of proximity is used to provide a variable signal to the driver of the vehicle to alert the driver to such proximity. In one embodiment, the variable signal to the driver includes haptic sensations that are imparted through, for example, the steering wheel and/or the driver's seat. Visual and audible signals can also be used if desired. The signal itself can vary in intensity with respect to boundary proximity in a variety of ways, including through both linear and non-linear patterns, variable maximum signal intensity, and so forth.
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