When you are coming into St. Mary’s via Hwy 63 (heading southbound) the speed limit drops from 60–> 45–>30 very quickly and as you are going up and then down a hill on a turn as well. The 30mph is from the top of the hill down the other side into the town. The cop sits about 3 blocks down with Ka band Constant-On. I got a speeding ticket here for 43 in a 30. The cop even told me to watch for speed traps in small towns! He sits there in the evening almost every night.