Which of the following is the best description for how the police officers knew the driver was speeding? The driver was not speeding and the police made a mistake since, if you add up the speeds 50 mph, 50 mph, and the average speed and then divide by 3, you get 60 mph, and this is less than the speed limit. The car traveled at exactly the average speed during the entire interval, so the driver was speeding since the average speed is greater than the speed limit. The police officers could not have known anything about the driver's speed during the interval. They made a mistake. Since the constant speed needed to travel the 1 mile distance in 45 seconds is above the speed limit, it must be true that the driver had a speed greater than 55 miles per hour during at least part of the interval