Upon entering the town of David City on the South end by the Aquinas High School the 4 lane highway slows down to a speed limit of 35 while descending a hill. A officer will hid in the trees of the city park or on the opposite side by a building a stop people entering the town. The highway continues through the town as a 4 lane highway and will drop down to 25 mph for a 6 block range then increase again. A police officer will sit in an alley by the railroad tracks behind a building a clock people going over the railroad tracks going over 25mph. Also on the north side of town while exiting the town, the highway narrows to a two lane but does not increase to 60mph for approximately 3/4 of a mile.