System for indicating operation time of motor vehicles and the like

摘要

The driver of a vehicle is informed that he has driven continuously for a present limit driving time and thus should rest for a preset rest period by a system comprising: a first timer for setting the limit driving time and starting to operate upon detecting that the vehicle driving has started; a second timer for setting the rest period and starting to operate upon detecting stopping of driving; warning means for emitting a warning upon detecting that the set limit driving time has been counted after start of the first timer operation; means for rendering the warning means inoperative upon detecting that the set rest period has been counted after start of the second timer operation; and means for causing the operation of the first timer to continue when the vehicle driving is restarted before completion of counting of the set rest period after start of the second timer operation.