Who share the road with an impaired driver are at risk.

All who share the road with an impaired driver are at risk.  The definition of an impaired driver is someone who is driving a car while under the influence of alcohol or drugs, or has a medical condition, or is texting or talking on a mobile phone. Impaired driving is dangerous both for the driver, other drivers, pedestrians or anyone in the vicinity of the impaired driver. Impaired driving is the cause of more than half of the car accidents in the United States of America. It

B. a circuit. i think