There are basically two types of rumble strips: shoulder/center rumble
strips and in-lane rumble strips. In an embodiment of the invention,
there is a device that automatically identifies the type of rumble strip
with which a vehicle tire is in contact with. The device may include a
processor adapted to receive input indicative of a state of rotation of a
first vehicle tire and input indicative of a state of rotation of a
second vehicle tire when one or more of the first vehicle tire and the
second vehicle tire is in contact with a rumble strip. The processor
includes logic to compare the state of rotation of the first vehicle tire
to the state of rotation of the second vehicle tire, and determine from
the comparison, the type of rumble strip in contact with at least one of
the first vehicle tire and the second vehicle tire.