I was going east on 100 throu Los fresnos july 23. When I was halfway across the tiny town when i notice a police car coming from the opposite direction at the other end of town, lights already flashing. He passes me, by this time Im at the speedlimt, does a ckfast Uturn pulls me over near the east end of town. The officer tells me I was clocked doing 41 in a 30. I had not seen any other officers when I entered the town and the last spd limit sign I saw was 45, but was safely slowing down (41 from 45). How did the officertown know how fast I was going from the other end of the town??