When you cross Wilke Rd. headed east, the speed limit is lowered from 40 to 30. It is residential on both sides of Euclid, but this is definitely a trap. Traffic calmly and safely moves along at 40 or 45, but the Arlington Heights PD doesn’t think so. Make sure you’re going under 40 even if it feels so slow that you think you will end up eating dinner instead of lunch. I believe they are using instant on radar because my detector will go off KA4 and then suddenly go quiet right before I pass them most of the time.