The gap between Barclay and Templeville was filled in the late 1930s. MD 302 was extended west toward Church Hill in the late 1940s and to US 301 in the mid-1960s.
The distance between Barclay and Templeville was bridged in the late 1930s. MD 302 was extended westward toward Church Hill in the late 1940s, and to US 301 in the mid-1960s.