Mr. Smith read a sign on the Massachusetts Turnpike saying, “Minimum speed 40 miles per hour (mph).” He drove at 35 mph so he wouldn’t go over the speed limit, but a policeman pulled him over and gave him a ticket. Why?

Mr. Smith was driving below the minimum speed limit stated on the sign. The sign clearly indicated a minimum speed requirement of 40 mph, and Mr. Smith was traveling at 35 mph, which is below that limit. Therefore, he was in violation of the minimum speed limit and received a ticket from the police officer for failing to maintain the required speed.