In 1930, the state highway between Middletown and Mount Pleasant was finished. By 1931, the remainder became a state highway. When Delaware started numbering state highways by 1936, this road remained unnumbered.
In 1930, the road between Middletown and Mount Pleasant was finished. The rest of the road became a state highway by 1931. However, when Delaware started numbering its state highways in 1936, this particular stretch of road did not receive a number or designation.