| 摘要 |
The invention relates to an ACC (2) of an automatic running control system which is provided with a constant speed control means (43) and a headway distance control means (42). The ACC (2) detects information on a headway distance from a preceding vehicle and a relative speed fed from a radar (1) and, when the detected headway distance is a predetermined value or less, uses a control mode selector means (41) to select the headway distance control mode. When the condition of brake operation is switched from being operated to not being operated, the ACC (2) restores a vehicle speed to a predetermined target vehicle speed (V0) using a vehicle-restoring rate in accordance with a rate of releasing a brake pedal (5) as operated by the driver.
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