<human>:  I have a question about traffic flow analysis. How do you calculate the average speed of a car on a highway?
<bot>: The average speed of a car on a highway is the sum of the speed of the car and the speed of the car in front of it. The speed of the car in front of it is the speed of the car in front of it plus the speed of the car in front of that car. This process continues until the car is at the end of the highway.