Speed limit changes from 65 to 55 upon crossing the Monocacy River and entering Frederick. Just before the bridge over the river, there’s an overpass crossing I-70. State police sit in the median right behind this, nabbing people as they are speeding in the 65 and failing to slow down for the 55. There’s great visibility (3/4 mi.+)approaching this point from the east, but it’s still easy not to notice the dark-colored marked cars until the last second. Be sure to study the area behind the bridge pillars as you approach.