Remember your task is to keep the family on schedule. Your family is on the way. As the car turns onto the highway the rain is beginning to fall and you hear a siren. A police car whizzes by, followed by a tow truck. Two miles ahead of you, a car has a flat tire.
Traffic is stopped.
In school you learned that traffic centers monitor freeways and major roads, using video systems. As you speak, a specialist monitoring the freeway from a traffic center notifies the police, a tow truck driver, and a traffic reporter. The police call for an ambulance in case of an emergency. The electronic highway messaging sign flashes. He takes the advice and arrives at the transit station right at boarding time.