Speed limit on Highway 90 entering Katy from Brookshire goes from 55 to 45, then down to 35 before Carolina Street (still relatively rural) to just past FM 1463 (.07 miles total), then goes back up to 40 through the "Business District" area before intersecting the Interstate… a very smart trap against people who are used to the "reduction as you get closer to the center of town, higher speed limit as you leave town".