| http://www.w3.org/ns/prov#value | - It should be understood that a wide variety of methods for warning the vehicle operator of danger fall within the scope of the present invention, such as inducing vibration in the steering wheel, pedals or other vehicle controls, such that the vibration increases as the level of the warning increases, and/or activating an audible tone that increases in pitch or volume as the level of the warning i
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