US 15 continues north as a four-lane controlled-access expressway that has directional crossover intersections with Hayward Road and Monocacy Boulevard before leaving the city of Frederick by crossing Tuscarora Creek.
US 15 continues north as a four-lane controlled-access expressway before leaving the city of Frederick by crossing Tuscarora Creek. US 15 continues north as a four-lane controlled-Monocacy Boulevard before leaving the city of Frederick by crossing Tuscarora Creek. This access expressway has directional crossover intersections with Hayward Road.