The following distance alarming apparatus includes a memory responsive to an output signal value of a sensor, which changes in accordance with a driver's operation for speed adjustment of a subject vehicle, having remained unchanged for a prescribed time period, for storing a reference value for the...http://www.google.es/patents/US6522969?utm_source=gb-gplus-sharePatente US6522969 - Following distance displaying apparatus that changes alarming display according to operating states
Following distance displaying apparatus that changes alarming display ...
