 The highway was extended south through Germantown in the early 1920s and extended to Darnestown in the early 1930s.MD 118 was relocated and expanded to a divided highway through Germantown in the late 1980s and late 1990s, and near its northern end in the mid-1990s.MD 118 begins at an intersection with MD 28 (Darnestown Road) in the village of Darnestown.