An embodiment of the present invention includes a device to alter transfer
characteristics of a road departure warning installation installed on a
road to a driver of a vehicle, including a rumble strip sensor to sense
input from a rumble strip and an adjustable vehicle component in
communication with the rumble strip sensor, the adjustable vehicle
component configured to automatically adjust to increase an amount of
input from the rumble strip sensed by the driver. Another embodiment of
the present invention includes a device to estimate lateral displacement
of a vehicle based on the location of a rumble strip installed on a road
with respect to the vehicle, the device including a processor configured
to receive four signals indicative of contact of a rumble strip with
respective associated four tires of the vehicle and to estimate a lateral
distance that the vehicle has traveled beyond the detected rumble strip.