DE 18 runs concurrent with DE 404 from its intersection with that highway southeast of Bridgeville to the eastern terminus, where DE 404 continues eastward to Five Points on US 9. The route passes through rural areas of western Sussex County. What would become DE 18 was built as a state highway in stages during the 1920s and 1930s.
DE 18 runs alongside DE 404 from its intersection southeast of Bridgeville to its eastern terminus, where DE 404 continues eastward to Five Points on US 9. The route passes through rural Sussex County areas. Initially constructed as a state highway in phases during the 1920s and 1930s.